Make undeletable unrenamable Folders in Windows

Have you ever wondered how you can make a folder which neither can be deleted nor be renamed. Well with this trick, you will be able to create folders in Windows which cannot be renamed or deleted.

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.

Testing:

To test this concept, make a new folder in Windows and try to give it a name same as any keyword mentioned 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 folder cannot 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, unrenamable folder in the drive you entered in Step 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\".