Why can't we make CON, PRN,Null folder in windows? [duplicate]

Posted by TechnoKnol on Super User See other posts from Super User or by TechnoKnol
Published on 2013-06-28T18:51:58Z Indexed on 2014/08/20 22:24 UTC
Read the original article Hit count: 164

Filed under:

windows-7

|

windows-explorer

This question already has an answer here:

Unable to rename a folder or a file as 'con' 8 answers

When i make new folder and rename it to nul it says The Specified device name is invalid.

then I searched which are the other folders we can't make, and get names con, nul, prn ?

what are these names stands for ? and why can't we make folders with these names ?

© Super User or respective owner

Related posts about windows-7

Server 2012 DFS New Member Issue

as seen on Server Fault - Search for 'Server Fault'
I am trying to add a new member to our DFS topology. We have 3 DCs (VMs - VMware) running Windows server 2012, two servers are located in or Primary site and the third at our DR site. Currently the two servers at our primary site are currently replicating DFS (full mesh) and are working fine. I have… >>> More
error in IIS7 but not on IIS6

as seen on Server Fault - Search for 'Server Fault'
I have a website that is we are now deploying to windows 2008 servers that has worked in the past on IIS6 without a problem. It is using .net 2 framework. Most of the website works. Just when we create a screen report over a certain size on the server we get this error. Event code: 3005 Event… >>> More
error in IIS7 but not on IIS6

as seen on Server Fault - Search for 'Server Fault'
I have a website that is we are now deploying to windows 2008 servers that has worked in the past on IIS6 without a problem. It is using .net 2 framework. Most of the website works. Just when we create a screen report over a certain size on the server we get this error. Event code: 3005 Event… >>> More
Microsoft Management Console stops working when I add snap-in to it

as seen on Super User - Search for 'Super User'
I have Windows 7 Ultimate OS. I'm opening mmc.exe as administrator and trying add Certificates or any other snap-in, then while loading that snap-in MMC breaks and displays following message and after that it closes automatically once I click on close button on that message. What could be the problem… >>> More
Handling keyboard and mouse input (Win API)

as seen on Game Development - Search for 'Game Development'
There is a number of ways to catch mouse or keyboard under Windows. So I tried some of them, but every of them has some advantages and drawbacks. I want to ask you: Which method do use? I've tried these: WM_KEYDOWN/WM_KEYUP - Main disadvantage is that, I can't distinguish between left and right-handed… >>> More

Related posts about windows-explorer

Alias/shortcut in windows explorer address bar

as seen on Super User - Search for 'Super User'
The question comes from when opening 'Run' in start menu (windows key+R) and enter system32 will open up an explorer and directly go to C:\WINDOWS\system32. Q1: how to make my own alias, so when I enter photos, it brings me to c:\photos Q2: Is there any way to use alias in windows explorer address… >>> More
Windows Explorer Double-click opens new window (Windows 7)

as seen on Super User - Search for 'Super User'
When double-clicking on a folder in Windows Explorer list window it opens a new window. Tools-Folder Options-Open each folder in same window is selected. How can I find which plugin or application is messing with this behavior? And fix it. >>> More
Windows Explorer has stopped working?

as seen on Super User - Search for 'Super User'
I have OS Windows 7 RTM. Sometimes when I click on some folders or some of partitions there's an error "Windows explorer has stopped working". Can I fix this? Does the same mistake exist on the Windows 7 full version? Thanks >>> More
Windows Explorer argument not being interpreted?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm currently using: Process.Start("explorer.exe", "/Select, " + fullPath); //with file name.extension That basically tells windows explorer to open the folder where the file is in, with the given file selected. But, by the forces of evil, sometimes it works and sometimes it just opens the file… >>> More
Why does DEP kill IE when accessing Microsoft FTP?

as seen on Super User - Search for 'Super User'
I start up IE (9.0.8112.16421) with about:blank and I go to ftp://ftp.microsoft.com/ I press Alt, click View and then Open FTP Site in Windows Explorer. At this point IE stops responding and eventually crashes (though the window is still active, sometimes) and I get the usual Windows dialog box saying… >>> More