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  • System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host

    - by coffeeaddict
    We have 2 identical database tables on our dev server. In both is a table that holds an X509Certificate2 data in one of its fields. When I grab the cert along with the password that I've been using all along, it works over the first database just fine. I run the same code though over the 2nd database and get this error and I don't get why if the setup is exactly the same and the database is also on this server. So I'm not sure why when I switch my connection string to talk to Database2, even though it's setup the same and the code I'm running over it is the same, it complains. Here's the stack trace: An existing connection was forcibly closed by the remote host Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace: [SocketException (0x2746): An existing connection was forcibly closed by the remote host] System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) +232 [IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.] System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) +7035903 System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count) +58 System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest) +116 System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest) +123 System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest) +86 System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest) +123 System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest) +86 System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest) +123 System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest) +86 System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest) +123 System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest) +7184357 System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult) +217 System.Threading.ExecutionContext.runTryCode(Object userData) +376 System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData) +0 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) +98 System.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result) +1134 System.Net.TlsStream.Write(Byte[] buffer, Int32 offset, Int32 size) +88 System.Net.PooledStream.Write(Byte[] buffer, Int32 offset, Int32 size) +20 System.Net.ConnectStream.WriteHeaders(Boolean async) +360 [WebException: The underlying connection was closed: An unexpected error occurred on a send.] System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request) +857631 System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse(WebRequest request) +10 System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) +243 Pmall.PayPal.PayPalApi.PayPalAPIAASoapBinding.SetExpressCheckout(SetExpressCheckoutReq SetExpressCheckoutReq) in C:\www\ssss\ssss\ssss\ssss\Reference.cs:1304 ssss.PayPal.ExpressCheckout.PayPalCheckout.SetExpressCheckout(PaymentDetailsType[] paymentDetails, String returnURL, String cancelURL, PayPalPaymentFlowType paymentFlowType) in C:\www\ssss\ssss\ssss\PayPalCheckout.cs:96 ssss.Web.ssss.SetExpressCheckout() in C:\www\ssss\ssss\ssss.aspx.cs:83 ssss.Web.ssss.Page_Load(Object sender, EventArgs e) in C:\www\ssss\ssss\Register.aspx.cs:24 System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +25 System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +42 System.Web.UI.Control.OnLoad(EventArgs e) +132 System.Web.UI.Control.LoadRecursive() +66 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2428

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  • SQL SERVER – Core Concepts – Elasticity, Scalability and ACID Properties – Exploring NuoDB an Elastically Scalable Database System

    - by pinaldave
    I have been recently exploring Elasticity and Scalability attributes of databases. You can see that in my earlier blog posts about NuoDB where I wanted to look at Elasticity and Scalability concepts. The concepts are very interesting, and intriguing as well. I have discussed these concepts with my friend Joyti M and together we have come up with this interesting read. The goal of this article is to answer following simple questions What is Elasticity? What is Scalability? How ACID properties vary from NOSQL Concepts? What are the prevailing problems in the current database system architectures? Why is NuoDB  an innovative and welcome change in database paradigm? Elasticity This word’s original form is used in many different ways and honestly it does do a decent job in holding things together over the years as a person grows and contracts. Within the tech world, and specifically related to software systems (database, application servers), it has come to mean a few things - allow stretching of resources without reaching the breaking point (on demand). What are resources in this context? Resources are the usual suspects – RAM/CPU/IO/Bandwidth in the form of a container (a process or bunch of processes combined as modules). When it is about increasing resources the simplest idea which comes to mind is the addition of another container. Another container means adding a brand new physical node. When it is about adding a new node there are two questions which comes to mind. 1) Can we add another node to our software system? 2) If yes, does adding new node cause downtime for the system? Let us assume we have added new node, let us see what the new needs of the system are when a new node is added. Balancing incoming requests to multiple nodes Synchronization of a shared state across multiple nodes Identification of “downstate” and resolution action to bring it to “upstate” Well, adding a new node has its advantages as well. Here are few of the positive points Throughput can increase nearly horizontally across the node throughout the system Response times of application will increase as in-between layer interactions will be improved Now, Let us put the above concepts in the perspective of a Database. When we mention the term “running out of resources” or “application is bound to resources” the resources can be CPU, Memory or Bandwidth. The regular approach to “gain scalability” in the database is to look around for bottlenecks and increase the bottlenecked resource. When we have memory as a bottleneck we look at the data buffers, locks, query plans or indexes. After a point even this is not enough as there needs to be an efficient way of managing such large workload on a “single machine” across memory and CPU bound (right kind of scheduling)  workload. We next move on to either read/write separation of the workload or functionality-based sharing so that we still have control of the individual. But this requires lots of planning and change in client systems in terms of knowing where to go/update/read and for reporting applications to “aggregate the data” in an intelligent way. What we ideally need is an intelligent layer which allows us to do these things without us getting into managing, monitoring and distributing the workload. Scalability In the context of database/applications, scalability means three main things Ability to handle normal loads without pressure E.g. X users at the Y utilization of resources (CPU, Memory, Bandwidth) on the Z kind of hardware (4 processor, 32 GB machine with 15000 RPM SATA drives and 1 GHz Network switch) with T throughput Ability to scale up to expected peak load which is greater than normal load with acceptable response times Ability to provide acceptable response times across the system E.g. Response time in S milliseconds (or agreed upon unit of measure) – 90% of the time The Issue – Need of Scale In normal cases one can plan for the load testing to test out normal, peak, and stress scenarios to ensure specific hardware meets the needs. With help from Hardware and Software partners and best practices, bottlenecks can be identified and requisite resources added to the system. Unfortunately this vertical scale is expensive and difficult to achieve and most of the operational people need the ability to scale horizontally. This helps in getting better throughput as there are physical limits in terms of adding resources (Memory, CPU, Bandwidth and Storage) indefinitely. Today we have different options to achieve scalability: Read & Write Separation The idea here is to do actual writes to one store and configure slaves receiving the latest data with acceptable delays. Slaves can be used for balancing out reads. We can also explore functional separation or sharing as well. We can separate data operations by a specific identifier (e.g. region, year, month) and consolidate it for reporting purposes. For functional separation the major disadvantage is when schema changes or workload pattern changes. As the requirement grows one still needs to deal with scale need in manual ways by providing an abstraction in the middle tier code. Using NOSQL solutions The idea is to flatten out the structures in general to keep all values which are retrieved together at the same store and provide flexible schema. The issue with the stores is that they are compromising on mostly consistency (no ACID guarantees) and one has to use NON-SQL dialect to work with the store. The other major issue is about education with NOSQL solutions. Would one really want to make these compromises on the ability to connect and retrieve in simple SQL manner and learn other skill sets? Or for that matter give up on ACID guarantee and start dealing with consistency issues? Hybrid Deployment – Mac, Linux, Cloud, and Windows One of the challenges today that we see across On-premise vs Cloud infrastructure is a difference in abilities. Take for example SQL Azure – it is wonderful in its concepts of throttling (as it is shared deployment) of resources and ability to scale using federation. However, the same abilities are not available on premise. This is not a mistake, mind you – but a compromise of the sweet spot of workloads, customer requirements and operational SLAs which can be supported by the team. In today’s world it is imperative that databases are available across operating systems – which are a commodity and used by developers of all hues. An Ideal Database Ability List A system which allows a linear scale of the system (increase in throughput with reasonable response time) with the addition of resources A system which does not compromise on the ACID guarantees and require developers to learn new paradigms A system which does not force fit a new way interacting with database by learning Non-SQL dialect A system which does not force fit its mechanisms for providing availability across its various modules. Well NuoDB is the first database which has all of the above abilities and much more. In future articles I will cover my hands-on experience with it. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology Tagged: NuoDB

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  • Hotspot is getting disconnected from other windows system?

    - by Gaurav_Java
    I created Hotspot for sharing my system internet for other system . but after 5 - 10 min my system internet is not able to share internet but it is connected with other windows system .windows showing (No internet access ) But after running this sudo killall dnsmasq windows is able to use internet connection not happening with one system same thing is happening with 2 -3 windows system . In many cases i have 2 restart my system Here My Hotspot setting

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  • Resolving System Restore error - Error 0x800423F3 - The writer experienced a transient error

    - by Gishu
    System restore just stopped working, when I needed it most. (tried diff restore points... same error). Now everytime I run system-restore, it fails with the above error message. I cleared the event logs and retried to isolate the relevant events. I see 5 warnings and 1 info event from VSS and 1 error from System Restore. Here's the first warning from VSS and the error http://dl.dropbox.com/u/11733224/SystemRestore-FirstWarning.txt http://dl.dropbox.com/u/11733224/SystemRestore-FirstError.txt Tried a lot of stuff, but in vain; this error still persists.

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  • Resolving System Restore error - Error 0x800423F3 - The writer experienced a transient error

    - by Gishu
    System restore just stopped working, when I needed it most. (tried diff restore points... same error). Now everytime I run system-restore, it fails with the above error message. I cleared the event logs and retried to isolate the relevant events. I see 5 warnings and 1 info event from VSS and 1 error from System Restore. Here's the first warning from VSS and the error http://dl.dropbox.com/u/11733224/SystemRestore-FirstWarning.txt http://dl.dropbox.com/u/11733224/SystemRestore-FirstError.txt Tried a lot of stuff, but in vain; this error still persists.

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  • XP Computer won't start (Missing/Corrupt 'System' file) - recently added new hard drive

    - by qwerty2
    Hi all, Pulling my hair out here. I recently replaced my D: 1TB drive (not a system drive) with a new 1.5TB drive. I loaded Windows XP, formatted the new drive and it was showing as working fine, alongside my C: windows system drive. I restart my machine and all of a sudden, Windows doesn't load and instead I get: "Windows could not start beause the following file is missing or corrupt" \WINDOWS\SYSTEM32\CONFIG\SYSTEM I don't have the original XP installation CD, although I do have another copy of XP, when I try and boot to it, I get the blue 'STOP' screen after it attempts to load the setup utlity for about a minute. Can someone please help? When I set up my new hard drive as a primary partition did this someone screw up my C: hard drive? Did it perhaps unmount it somehow? Any help would be fantastic. Thanks

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  • Recommendation on Ticket system with billing feature

    - by jacklty
    Actually, I do not know if I have used the right terms to describe our situation. Basically, We would like to have a system to help us to do billing and support at the same time. For example, we would like to offer outside users a customer support with ticket system, however the outside users need to purchase some credits beforehand through the system in order to submit their requests. Sometimes, our representatives will charge extra unit of credit for solving some open tickets due to the complexity and hours spent. (It will be nice to submit user a further billing request to same open ticket, and user can either accept/declined) Is there any available application or service we can use for the purpose above?

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  • Windows System Recovery: Is it needed?

    - by starcorn
    Hello, I just recently deactivated system recovery on Vista, which saved me a huge amount of space. But I wonder is it necessary to have it activated? I can't remember that I any time had any use of system recovery anyway. And since it is Microsoft it probably would do a sloppy job anyway or? This question is for Windows XP, Vista, and 7. Do you have it activated? You can leave a comment if you have any opinion about the system recovery

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  • Extract registry key from NTBackup System State backup

    - by phoenix8
    A Windows Server 2003 machine died recently but I need some information that was contained in the now-defunct server's registry. I have a "System State" backup file created by the Windows Server 2003 built-in backup program (NTBackup.exe). Is there any way to extract a key/value out of the backup file? I might be able do a Win2003 install on a similar machine then do a system-state restore but that's a lot of effort and I don't know for certain that the system-state restore will work on a different spec machine. (Would it work if I booted up in 'safe mode'?) But I'd really rather just get at the data straight out of the NTBackup file zip-file-esque styles if that's possible.

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  • The best way to make full system dump on Centos [duplicate]

    - by tester3
    This question already has an answer here: Centos 5 Full backup 1 answer I am on Centos 6.5 with a lot of soft and services installed and working. Also I've got a lot of configs which damaged my brain and I dont want to do it again:) So, can anyone please advice the best way to make a full system dump with all data, so I need only to copy-paste them to new system to get my system ready on the other machine. Or something like that? P.S. Data on my hdd is encrypted, and I'd liked and encrypted dump too. Please help:)

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  • Running MySQL as SYSTEM Service in Windows XP

    - by enesviem
    I have this strange problem where I create a database in MySQL and I need to restart mysqld but I can't seem to do it with info the MySQL docs. Then, I kill it from the Task Manager and I can't restart it. When I look at the process, it is run by the SYSTEM, rather than me. When I run mysqld it starts the process by me, not the SYSTEM. Am I shutting it down incorrectly? IS there a way to start this daemon as the SYSTEM?

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  • System Center 2012 R2 System Discovery Network Utilization

    - by AtomicReaction
    I'm in charge of a deployment of Microsoft System Center Configuration Manager 2012 R2. Currently, I'm working through the discovery methods and trying to decide how to enable automatic discovery of systems and users. On Microsoft's documentation, they warn that Configuration Manager Automatic Discovery traffic can get pretty significant if you aren't careful in your implementation. Can anyone who has used this give me some information on how much traffic I should expect? We currently have around 1000 computers and 4000 user accounts in Active Directory. Thanks!

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  • Getting started with server and system adminstration

    - by sid__
    I am web developer and I have been doing a lot of server configurations and system administrative tasks lately I was wondering if someone could recommend books and tutorials that would help understand how things are done the right way. Though I mostly work with Apache and Nginx for configuring and maintaining my applications, my approach has been largely trial and error based with information off google and blogs. Could someone recommend books that explain how to get started with system administrative tasks (preferably in a tutorial fashion so that I may try and understand the workings of the system). I work mostly on Linux systems on EC2 Thanks in advance.

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  • system.Net Tracing - Not able to view Request Body in single line

    - by amz
    Hi All, I am using system.Net tracing to log what is being sent over the wire. I am able to see the Http Request Body content but are in seprate lines. I want to see like below Not like this System.Net Verbose: 0 : [118756] Data from ConnectStream#59274039::Read System.Net Verbose: 0 : [118756] 00000000 : 3C 73 3A 45 6E 76 65 6C-6F 70 65 20 78 6D 6C 6E : System.Net Verbose: 0 : [118756] 00000040 : 3C 73 3A 42 6F 64 79 3E-3C 53 75 62 6D 69 74 41 : < System.Net Verbose: 0 : [118756] 00000080 : 53 75 62 6D 69 74 41 70-70 6C 69 63 61 74 69 6F : SubmitApplicatio System.Net Verbose: 0 : [118756] 00000090 : 6E 52 65 73 75 6C 74 3E-74 72 75 65 3C 2F 53 75 : nResulttrue System.Net Verbose: 0 : [118756] Exiting ConnectStream#59274039::Read() - 232#232

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  • Adding custom/new properties to any file regardless of type and extension e.g. setting 'Author' on a

    - by Vaibhav Garg
    I want the ability add properties and tags to a file (specifically ebook files and ebook related properties in Windows 7 but interested to go so for as many OSes as possible) For e.g. Example.txt or Example.doc or Example.epub should all store and carry properties like 'Author', 'Publication date', 'Tags' etc.. the properties should be stored with the file itself. Such that if it is transferred to another system it retains the properties (even if i need to install 'my app' to support this function on the other machine) How do I make this possible using .net (preferred) and what file system concepts should I learn to understand the underlying concepts and limitations to be able to implement this feature? Any application that already does this? Thank you

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  • How to use batch rendering with an entity component system?

    - by Kiril
    I have an entity component system and a 2D rendering engine. Because I have a lot of repeating sprites (the entities are non-animated, the background is tile based) I would really like to use batch rendering to reduce calls to the drawing routine. What would be the best way to integrate this with an engtity system? I thought about creating and populating the sprite batche every frame update, but that will probably be very slow. A better way would be to add a reference to an entity's quad to the sprite batch at initialization, but that would mean that the entity factory has to be aware of the Rendering System or that the sprite batch has to be a component of some Cache entity. One case violates encapsulation pretty heavily, while the other forces a non-game object entity in the entity system, which I am not sure I like a lot. As for engine, I am using Love2D (Love2D website) and FEZ ( FEZ website) as entity system(so everything is in Lua). I am more interested in a generic pattern of how to properly implement that rather than a language/library specific solution. Thanks in advance!

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  • Webapp in Jetty can't find properties file after running a couple days

    - by Cuga
    I have a webapp running in Jetty on Mac OS 10.6. After a few days of it running and without the server losing power or rebooting, it seems to stop working saying it can't find a properties file. This properties file is included inside the .war file deployed to the /webapps directory. If I restart Jetty as the superuser the web service works again just fine. Can anyone lend any advice to what's going on and how I can fix it? The error being shown when it isn't working is: Problem accessing /my-web-service. Reason: INTERNAL_SERVER_ERROR Caused by: java.lang.NullPointerException at com.company.service.Dao.readFromPropertiesFile(BwDao.java:35) at com.company.service.ServletHandler.doGet(ProxyClass.java:66) ... at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) Here's where the properties files exist that it's trying to read from the .war file: And this is how the properties are being read from the classpath: Properties properties = new Properties(); properties.load(Thread.currentThread().getContextClassLoader().getResourceAsStream( "app.properties")); Again, this does work just fine if I have just restarted the server, but it seems to fail after running a few days.

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  • Home entertainment karaoke system

    - by Mehper C. Palavuzlar
    Here is what I have: 40" Sony Bravia LCD TV, 5+1 speaker system, lots of original Karaoke CDs, and of course, a microphone. To set up a karaoke entertainment system, what kind of hardware do I need? Are there any standalone karaoke players out there? I hope my only option is not having to connect my laptop to TV. I already have karaoke software on my laptop but I wanna step up to a higher level without the help of a computer.

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  • Permanently hide network disconnected icon from system tray

    - by Steve
    On Windows XP, I have a disconnected Wireless connection which shows up in the System Tray. I have gone into Network Connections dialog box and elected not to show an icon when it is disconnected, yet it remains visible. I have gone into the Task bar properties and elected to always hide this icon, but that doesn't remove it from the system tray. How do I remove it? Thanks

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  • Running SEP scans with the SYSTEM account

    - by Eric
    I need to run Symantec Endpoint Protection scans on Windows 7 systems using the SYSTEM account. I know that I can run DoScan.exe to manually run a scan, and this works fine using a regular user account. Unfortunately, when I try to run DoScan as SYSTEM, the application exits immediately without running a scan. Is there a way that I can get this to work, or another application besides DoScan.exe that I should be using?

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  • System files not hidden Win XP

    - by ULTRA_POROV
    I recently copied my win xp install from one hard to another(via ubuntu live cd) Everything went well, except that all the hidden system files(boot.ini, ntdlr, io.sys) are no longer hidden. I tried this: attrib +s c:/IO.sys No effect. The files are still visible even though the setting to hide system files is checked. Any solutions? Thanks.

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  • Dissect System Restore snapshots

    - by Unsigned
    Is there any way to map the A000????.??? filenames in the System Volume Information to their original names, without restoring them? The reason I ask is that several files in one user's System Volume Information RP1 were infected by a rootkit. Although they've been removed, I'd like to be able to figure out what they were originally. A0001253.sys and A0001211.sys are not very helpful names. :) It happened on two systems, one XP SP2, the other XP SP3.

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  • Can i access Mac system remotely?

    - by TEJPAL
    i have a macbook and i have 6 windows desktop system. i want to access the macbook parallel same time 7 user. like 6 user accessing machbook on window system remotely, and one user using Mac at same time. how it is possible. Thank you in adv. to reply for my question.

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  • Can i access Mac system remotely?

    - by TEJPAL
    i have a macbook and i have 6 windows desktop system. i want to access the macbook parallel same time 7 user. like 6 user accessing machbook on window system remotely, and one user using Mac at same time. how it is possible. Thank you in adv. to reply for my question.

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