I tried to run the copy, mkdir, net stop commands, none of them worked and showed the same - access denied. And when I tried to run 'net stop' command (tried to stop some services), it showed:
System error 5 occured ACCESS DENIED
But note that, when I try to run same commands in other drive like E: F:, it's working nicely. But the operating system drive is not allowing me.
For this problem, I also can't run some of my useful batch files on that computer. What can I do? The computer uses Avast! FREE Antivirus, no extra firewall. I am sure that AVAST is not doing this coz I use avast in my own pc.