Why folders with the name CON can’t be created in Windows??

Hey Guys

Some people don’t know why they can’t create it?
Very few know that they can still create it someway. But don’t know why are they supposed to do exactly like that.
Now, After reading this tutorial, you will become one of the rest
__________________________________________________ _________________________
Type 1:
Not only CON, we cannot create any of these
CON, PRN, AUX, NUL, COM1, COM2, COM3, COM4, COM5, COM6, COM7, COM8, COM9, LPT1, LPT2, LPT3, LPT4, LPT5, LPT6, LPT7, LPT8, LPT9 and more
The reason is that con, prn, lpt1..lpt9, etc are underlying devices from the time dos was written. so if u r allowed to create such folders, there will be an ambiguity in where to write data when the data is supposed to go to the specified ugydevices. In other words, if i want to print something, internally what windows does is — it will write the data to the folder prn (virtually u can call it a folder, i mean prn, con, etc are virtual folders in device level). So if we are able to create con folder, windows will get confused where to write the data, to virtual con folder or real one.
So Now, Try this…
Open the Command prompt by Start -> Run and type cmd

Code:

C:\> md \\.\c:\con

Now, Open My Computer and browse through the path where you created CON folder… Surprising?? Yeah, you have created it successfully

Now, try to delete the folder from My computer
OOPS!!! You can’t delete it…
Now, try this in command prompt console

Code:

C:\> rd \\.\c:\con

Yeah!! You did it…
__________________________________________________ __________________________

Type 2:
Well, let us now have a glance at how we were able to create it…
It is just because of the UNC Path (Universal Naming Convention). The Universal Naming Convention, or UNC, specifies a common syntax to describe the location of a network resource, such as a shared file, directory, or printer. Since, these conventions didn’t exist under pure DOS, they are not backward compatible. The UNC syntax for Windows systems is as follows.

\\RemoteHost\sharedfolder\resource

Where RemoteHost is the computer name / IP address of the computer that you wish to connect through remotely for accessing shared folder. The rest is the path.

(Here \\remotehost\drive:\con doesn’t make sense anyway, because without having a process on the remote host, there is no current ‘console’). It would be a security hazard as well, having the serial and parallel ports accessible for everyone who is allowed to read or write in any single directory.
The ” .” in the command \\.\c:\con suggest the local server. Now, you are pointing to your own computer. Since, you have all privileges on every folder of your computer, you can easily create it.

Display Legal Notice on Startup of your Windows !!

If your PC has multiple users then you can now display legal notice to every user before they login to your PC. This legal notice will be displayed at every startup just before the Desktop is loaded. Using this you can tell your friends about the do’s and dont’s in your computer when they login in your absence. Well you can do this pretty easily. For this there is one small registry hack. Here is the step-by-step instruction to do this.

1. Go to Start->Run, type regedit and hit ENTER

2. Navigate to the following key in the registry

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
\policies\system
On the right side pane look for “legalnoticecaption“, double click on it and enter the desired Legal Notice Caption.

3. Next below this look for “legalnoticetext” and enter the desired Legal Notice Text. The legal notice text can be up to a page in it’s size so that it can include a set of do’s and dont’s for your computer.

4. After you do this just restart your computer and upon the next startup you can see the legal notice information for your computer. This trick works on both XP and Vista. You can also try it on Windows 7 and should work with no problems.
Hope you like this post. Pass your comments.