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• How do anti-viruses work?

  - by Phoshi

  So I was thinking about viruses recently, and wondering how exactly antiviruses keep up? Considering anybody who'd been coding for a few weeks could hack together something do do nasty, nasty things to somebody's PC, the quantity alone would make a simple list of hashes prohibitive, so how do antiviruses do it? Do they monitor process activity and have a 3 strikes rule for doing virus-like things? And if so, what's stopping it from triggering on perfectly harmless things (like me moving files around in \system32)? I did a bit of googling, but the regular places didn't particularly help, and I couldn't find a dupe here, so I thought it'd be good to ask :)

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• VirtualPC/XPMode... trying to let a VM access pages served using IIS on the host machine

  - by John

  My host PC is running IIS7.5 under Windows7. I have a VM running XP to let me use IE6, but I've no idea what network settings on the VM/host are needed so the VM can access pages on the host. I thought if the host was 192.168.1.1, then from the VM I'd simply do http://192.168.1.1/... if I do this on the host it works but the VM can't see it. I'm assuming there are some shortcuts here rather than manually having to set up loads of permissions, e.g a shortcut way of letting the VM access the host maybe?

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• Error 1069 the service did not start due to a logon failure

  - by Si

  Our CruiseControl.NET service on Win2003 Server (VMWare Virtual) was recently changed from a service account to a user account to allow for a new part of our build process to work. The new user has "Log on as a service" rights, verified by checking Local Security Settings - Local Policies - User Rights Assignment, and the user password is set to never expire. The problem I'm facing is every time the service is restarted, I get the 1069 error as described in this questions subject. I have to go into the properties of the service (log on tab) and re-enter the password, even though it hasn't changed, and the user already has the appropriate rights. Once I enter the password apply the changes, a prompt appears telling me that the user has been granted log on as a service rights. The service will then start will no problems. Not a show stopper, but a pain none-the-less. Why isn't the password persisting with the service?

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• How can I troubleshoot SSD disconnection problems on Windows 7?

  - by 0xC0000022L

  I have a small SSD (Transcend StoreJet TS256GESD200K) which I am using on several computers. The drive is formatted with NTFS and recently I started noticing disconnects. Normally one probably wouldn't notice (you don't even get the notification sound in Windows when it disconnects), but since I use USBDLM and run a VM from that SSD, I get to see this first-hand. How could I best figure out whether the problem is the hardware (SSD, USB socket, USB cable or something in the PC) or software? In short: how can I locate the source of the disruption so that I can work on removing the problem? Side-note: SMART status for the SSD is clean.

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• What are current options to scan or convert a hand written note to a file on my laptop?

  - by goldenmean

  I wonder how come there are not many options when it comes to scan or convert a device which could be connected to a laptop/desktop, which could - 1] Allow me to write with a digital pen on some special surface, which is connected to my laptop and thus converts my hand written notes to a pdf/jpg/word. (Microsoft's failed attempt at windows based tablet PC in past comes to mind, but not anymore) Any such solution I can use with my laptop? 2] A document scanning device, apart from a flat bed scanner, integrated these days into multi function printers; anything that is portable enough to connect to my laptop?

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• How to connect with MySQL server if it won't connect via the socket?

  - by cwd

  I have an account on a shared server. I have jailshell access and also PhpMyAdmin. I want to run mysql commands via SSH but I'm getting an error: $ mysql -u mySqlUser -p mySqlPw Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' I can connect with PHP and phpMyAdmin, so would it be possible to call mysql from the shell and have it connect via an ip and port instead of the socket? The file /var/lib/mysql/mysql.sock does not exist - maybe that is intentional, and the only thing in /etc/my.cnf is [mysqld] skip-innodb More Info I don't have access to change system settings. I did a search in /var for mysql.sock but found nothing. However, phpMyAdmin might be connecting via a socket somehow: Really it would just be great if I could connect via IP. Also tried these two syntaxes: $ mysql -u mySqlUser -p mySqlPw -h localhost $ mysql -u mySqlUser -p mySqlPw -h localhost -P 3306 Both with the same result: ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

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• Can I take a HDD in Raid1 and plug it straight into a different machine?

  - by jacko

  I would assume that I can just take my HDD out of my NAS (in raid1 mirror) and plug it into another enclosure and have it work off the bat but I'd like to make sure... Any ideas? Edit: My current setup is a Netgear ReadyNAS in (hardware) raid1. I'm hoping to replace this with a home theatre type PC (possibly running Ubuntu), and would like to migrate my data without having to do a bulk transfer over my network between the 2 machines. Can anyone confirm the case for the Netgear ReadyNAS?

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• 1tera flop cluster?

  - by Adobe

  I want to buy a $40000 1 tera flop cluster to keep it in a room. What are the standard configurations? Cluster is supposed to do molecular dynamics simulations on biological systems. I'm proposed a 4 pc with 8 cores each by the selling company I'm deadling with. It looks like I also need infiniband. Does some one has an experience -- what phisical memory should I buy etc? I know things change very quickly... Still there might be a point or two to state. Edit: OS is supposed to be linux, application is gromacs.

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• md5sum of large files gives different results sometimes

  - by Emanuele

  I have an AMD quad core, 8 gb RAM, 1 SSD EXT2 (2 months old), 2 HDD EXT4, approximately 1 year old. I'm using Ubuntu 10.04 x86-64 and when I compute the md5sum of large files (9 GB) sometimes I get different values than the one stored on a reference file. Upon restarting and switching off the PC then I get the expected results no matter how many times I repeat it. But this is random. I've turn on ECC (the fastest possible settings) and the issue seems to be rarer, but I've run memtest86+ for 6+ hours without a glitch (and with ECC off!). Any idea? Should I update the BIOS of my motherboard (Asus EVO-something...don't remember it now)? I've tried all the rest apart this, but genuinely don't know what to do anymore... Any suggestion is appreciated!

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• Hard drive caught malware and all folders are in shortcuts

  - by Ammar

  I have an external hard drive from Seagate. I think it accidently caught a malware/virus, since all the files in there became shortcut folders. I have very important folders and now I cannot access them at all. I did not have an antivirus program; I just formatted the PC and forgot to install one. Just recently, I installed Avira and it caught the malware, but since I removed the malware via Avira, I can't access anything now. Please help me on what I need to do. I am really lost.

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• Apache Tomcat 6.0.29 startup causing Win XP SP3 reboot

  - by Liam

  Some of our Windows XP Developer machines die (black screen - no ping) when starting up Tomcat from a console. This only happens if the Tomcat debug console window is displayed (not minimised). When minimised, the startup / run is successful. I've checked for Tomcat logs and the crash sessions produce empty (zero bytes) tomcat log files. No system logs exist and no crash dump is created even though this is enabled in the Windows settings. The machine is dual screen and another machine with the same image has the same issue. The only clue is just before the crash, one of the monitors the system reports "Cannot display video mode 1280x1024" (approximate error, didn't write it down). Is there a way I can get Windows to produce log files of this crash session? Beyond running Tomcat as a service / minimised window, how can I fix (or even investigate)?

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• prevent use of 'net user' command to change passwords on windows vista / xp

  - by guest

  hello the point is, if i'm logged in (and as almost every windows user, i've got an admin-account), and someone comes across my not locked pc, it is possible to change my password the pro-way through using: net user Admin %NEW_PASSWD% what can i do to prevent that, besides not being logged in as admin. i once saw a way, where the 'net user' command was substituted by a .bat file. so if you call 'net user Admin ...', it runs this .bat-file instead, which locks the notebook immediately. problem is, i honestly don't know how i could let windows substitute eg net.exe with a .bat-file. (too little windows knowledge) do you know any way how to do it? i'd appreciate it.

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• single sign-on integrating SVN

  - by ramdaz

  I need to authenticate my windows users on to a Linux Server which will act as a primary authentication source. Users need to be authenticated and use their access to run SVN or Mercurial ( with something like Tortoise SVN client), or some versioning system. The versioning system need to be authenticated against the Linux Server's authentication source, and users need to use their Windows login username and password to server. I'd have attempted to do this normally on Samba. But is there a better choice? Also how do you create a roaming profile? That is anyone should be able to access their SVN from any PC as long as they use their right Windows username and password

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• Windows 7 VPN wont allow FTP, route FTP traffic through local network

  - by Rolf Herbert

  I use a VPN on my windows 7 PC for privacy and currently route all my traffic through the VPN. This arrangement is fine and its plenty fast. Unfortunately the VPN does not allow any FTP traffic so when I am updating websites I have to disconnect the VPN and work through my local connection. This is annoying and cumbersome. I have read a little about split tunnelling but this is not quite what I need, and it often talks about 'internet' traffic which is not specific to certain IPs or ports. Is it possible to route traffic on certain ports through the local connection, or is it possible to route traffic on certain IPs through the local connection using stuff built into windows 7..? Thanks

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• Laptop connects to other network but not to my home wireless

  - by Nilesh

  My home network's wireless SSID is say "XYZ" I also have an ethernet wire from the same router. I have two laptops A and B Earlier both A and B were able to connect to my home internet through the ethernet and wireless. Suddenly, the laptop B can no longer connect to XYZ or through ethernet. When I do plug the wire, i get the connection icon all green but when I try to access any web page it errors out (page not found) But strangely laptop B connects to my neighbours wireless SSID "ABC". I have also tested laptop B with other networks and it connects fine. Laptop A and many other devices still connect fine with my home wireless "XYZ" Strange thing is when my laptop B connects wireless through XYz, it gets the IP address but then none of the browsers (chrome,firefox, IE) can show any web pages. What settings should I be checking on laptop B that is preventing it to connect to my home internet. Thank you

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• Windows 7 file sharing password protecting or making stuff available to just me

  - by Carbonara

  Even with the new Homegroup feature I'm still finding the way Windows deals with folder sharing utterly baffling. Here's what I want to do. I have two computers, a PC Desktop and a laptop. I also live in a shared flat with other computer users. I have set up a Homegroup and a Workgroup on the desktop and joined them on the laptop and in the home group I have shared video, music and pictures. This is so that anyone on the network can view pictures and listen to music etc. But I want my Documents folder from my desktop to only be available to me on my laptop and not to anyone else that may be on the network. The Homegroup only allows (from what I can gather from the baffling array of options) sharing with everyone or no one. Is it possible to only allow the laptop to access the documents folder on the desktop? The user name and password are the same on both computers.

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• HDMI connection does not support HDCP

  - by mroggi

  Hi, My problem: error message when playing blu-ray movies stating that the HDCP encryption could not be established. My setup: A new projector (EPSON EMP TW700) with a HDCP-compliant HDMI port a PC with a brand-new graphics adapter (Sapphire HD 4350 512MB DDR2) supporting HDCP Connection made with a DVI cable (it's installed in my wall) and a DVI-HDMI adapter to connect the projector Latest drivers and software My questions: What can I do to establish the HDCP connection? Would it help to use the HDMI output of the graphics adapter instead of the DVI (could it be that the HDCP chip is only supported on HDMI?) Any other ideas? I am very thankful for any hint.

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• Grep all files in a directory and print matches with file name

  - by javanix

  I have a list of log files that I create as part of a video encoding script that I wrote. I would like to search all of them and print out certain statistics from the encode - how fast they were encoded, what settings were used, etc. I can search for the average framerate in one file via this 1 liner: cat ${filename} | grep average which outputs: work: average encoding speed for job is 23.211176 fps and search for the ratefactor: cat ${filename} | grep RF I would like to search all files in the directory and print off one, or prefereably both pieces of information along with the filename. Is there any way I can use find or grep to get this in a one-liner, or do I need to write a script? I would like output like this: /home/javanix/filename.log <RF line> <average line> I would like this to either work using FreeBSD 9 or Ubuntu 12.04.

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• Filtering serial port io

  - by mr odus

  I am currently working on a project where I communicate with hardware via a com port on its respective pc(win xp or 7) It is a fairly large project and sifting through the log file can be a bit of pain. This is my current setup. I use putty to do the actual serial communication, and write it to a log file. Then using MinGW Msys I filter it using tail -f "puttyLog" | grep -i "search term" Is there a better way to do this? I mean specifically filtering the input in realtime. Not that mine is terrible, but it still involves having to read from a log and sometimes there have been hangups where it will be delayed for a minute or 2. I have used software in the past with a main io window and then internal filter panels, but can no longer remember or find it.

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• Computer Locks Up Completely When Resuming From Standby

  - by kcoppock

  Okay, so I'm having a strange issue lately with my desktop, and off the top of my head I'm not sure what the problem is, so I'm hoping for some ideas on how to track down the cause. First, my PC: AMD Phenom 9600 Quad-Core 2.4 GHz 4 GB DDR2 160 GB boot HDD 1 TB & 120 GB secondary HDD Nvidia GeForce 8600 GTS Windows 7 Professional 64-bit I have my power settings as follows: Turn off the display: 10 minutes Turn off hard disk: 20 minutes Sleep after: Never After a while, I'll come back to use my computer again, wiggle the mouse, and the screen comes back on like normal, but the desktop is unresponsive. I can move the cursor, but nothing responds to clicks or keyboard entry. If I click a few times with the mouse, the computer eventually locks up completely and the mouse cursor stops moving as well. After I restart, everything works just fine. Is there a log you recommend checking or really any suggestions would be welcome at this point. Thanks!

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• Win2008 - restrict VPN user permissions

  - by Sebas

  Windows 2008 R2 SP1 Foundations file server with no AD, only workgroup sharing some folders, and now a RRAS server. Shared folders are open to everyone in the office (XPs and Sevens) without accounts/passwords, but I was thinking about partially limiting access to the new "VPNuser" account. I'm new to Windows Server and its permissions settings: I thought about denying access to vpnuser through NTFS rights in some folders. It doesn't work, but now I'm guessing that the vpnuser is not considered as a logged user (doesn't appear as such) and is considered a "guest", like the rest of people connecting in the office. I say that because of this: http://social.technet.microsoft.com/Forums/windowsserver/en-US/ff6d3726-ff41-4d3f-9d97-5361af0206dd/vpn-users-on-server-shows-as-guest?forum=winserverNIS Also, because when I create a txt file using the VPN connection, owner field shows in description as "guest". Am I right? How can I set different rights for the VPNuser from the rest of "guest" users in the office?

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• Use teamviewer for running web server [closed]

  - by Steve

  I have a PC behind NAT. I want to host a web server on it which is accessible from the internet. I cannot open any blocked ports nor do i have admin rights on the computer. But it has a teamviewer client running on it 24*7 to which i do have access(no vpn installed). I can accesss this client from anywhere using teamviewer. I want to know if somehow i can use teamviewer to get a ip/hostname that is accessible from the internet and host a webserver. Also is it possible to get an ip if i get admin access but without opening ports.

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• Windows Storage Server 2003: Shadow Copy (VSS) enabled for volume, but Previous Version not visible

  - by Jaap

  Windows Storage Server 2003 We have Shadow Copy (VSS) enabled for one volume. However Previous Version tab is not visible on the server on properties dialogs on any file or folder on that volume. We don't want this tab to be visible on the clients, just on the server. I've checked the VSS settings and they're definitly enabled for the volume. I'm stuck! Do I have to install the client-software on the server? The folder \%systemroot%\system32\clients\twclient contains 3 empty subdirs (location copies from docs)...

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• Cant access websites

  - by LiveEn

  Recently i have some problems accessing websites. When i try to access it says This webpage is not available. I tried accessing the site through FireFox, Internet Explorer and Chrome. I also tried with using a web proxy but still the same problem. This problem is only in my Desktop PC, all the websites works fine in my laptop Currently i cant access, yahoo.com download.com bing.com proxy.org daniweb.com aol.com and many forums I check with the host file but nothing is blocked in that. Can some one please suggest what is wrong?? Thanks

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• Error "iertutil.dll not found" after installing IE8

  - by christianlinnell

  I rolled out IE8 to a group of test users in our organisation overnight, and after logging in in the morning, several of the users reported the error Userinit.exe error and explorer.exe error - iertutil.dll not found After clicking OK, the PC just hangs with the background visible. A few people are reporting this error in various forums, but "do a system restore" is not a good solution. We can easily roll back to IE6 by replacing the DLL, or by uninstalling IE8. We just need a flawless rollout! We're on Windows XP Service Pack 3. Edit: We deploy via SMS. Initially we had 2 machines with the error, but somebody made a mistake with the test package and it rolled out five nights in a row. By the end of the five nights, 4 more machines had developed the same issue.

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