Hello and Welcome to TSF,
Lets start here:
in command prompt type: chkdsk /r (press enter)
error cannot lock harddisk
would you like to run checkdisk on next reboot?...type: Y (press enter)
Go ahead and reboot pc right now so it will run please.
Did this fix the issue or issues?
If this didnt fix the issue then proceed on......Download this file here:
run a ram test: In order to do this you will need to:
remove all of the ram sticks from the pc, run test on 1 stick at a time to test it,
each one separately, run 3 - 4 passes atleast before coming to any assumptions?
please post here with results, and this is sort of time consuming so it will take alot of patience to perform these tests, however these tests are necessary in determining
the problem or problems.