Hi Friends... Today I'm gonna tell u how to disable the most powerful tool in windows which is called CMD . Just Follow these steps:-
1) Press Win+ R (RUN)
2) Type gpedit.msc and Ok.
3) In Group Policy browse to "USER CONFIGURATION / ADMINISTRATIVE TEMPLATES" and highlight the Systems Folder.
4) Double click, "Prevent access to the command prompt."
5) Change settings to 'Enable' and click 'ok'
Try to Open CMD. I'm sure you won't be able to do this. Now do some tricky with this and make a virus to disable your friend's CMD