Thanks again for helping.
I did a full restore 6 months back(the only backup that was on the computer) to fix it since the user needed his pc ASAP, but i will consider it next time something like that pop up.
I'm a System Administrator at a company and yesterday i was handing a computer with very strange symptoms.
It started when a guy called me told me he can't open Outlook.exe (0xc0000006 error) and then i started getting more errors from the computer..
Now i can't go into drive C...