How to Make Undeletable, Unrenamable Folders

Basic Concept The basic concept behind this trick is the use of Keywords. Keywords are reserved words in any programming language that cannot be used as names of variables. Windows also uses certain keywords in its programming. Some of them are con, aux, lpt1, lpt2, lpt3, lpt4, lpt5, lpt6, lpt7, lpt8 and lpt9.

A Test
To test this concept, make a new folder in Windows and try to give it a name same as any keyword suggested above.

Result
Windows will not rename your folder to any of the keyword given above.

Trick
So the question arises, how can we make a folder with a keyword as its name? The solution to this problem is included in Windows itself. As we know that Windows has evolved from D.O.S.(Disk Operating System), its commands can be used in Windows. You can use D.O.S. Programming in Windows to create a folder with a keyword as its name using the steps given below:-

1. Click on Start.
2. Click on Run. Type in "cmd" without quotes.
3. In the Command Prompt Window that opens, type the name of the drive you wish to create your folder in the format <drive-name>: and press Enter. e.g. If you wish to create the undeletable folder in D drive, type "D:" without the quotes. Note that the foldercannot be created in the root of C:/ drive (if C: is your system drive).
4. Type this command- "md con\" or "md lpt1\" without the quotes and press Enter. You can choose any of the keywords given above as the name of your folder.

Now Windows will create an undeletable, un-re-namable folder in the drive you entered inStep 3. However the folder can be renamed to another keyword using Windows Explorer.

Deleting the Folder 

Although it is not possible to manually delete the folder, you can delete the folder by typing "rd con\" or "rd lpt1\" in Step 4 instead of "md con\" or "md lpt1\". 

Windows Compatibility: This works on Windows XP, Windows Vista, Windows 7 and Windows 8.

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