for a few months now, games freeze randomly while i play. when they freeze, small squares on the screen change places (it's awkward to explain). after few seconds they return to their place, but i have to reboot anyway. i remember it first happened when i was playing crysis (first one) few months ago, and i didn't change anything then. i meet the minimum requirments of all the games.
for some time, sometimes i got the error "The nv4_disp display driver has stopped working normally". i manually rebooted in safe mode, logged in as administrator and deleted every last file beggining with "nv" in c/windows/system32. then installed the newest driver, and i didn't get this error since.
when i looked in the event viewer, this error is listed around the time of the freeze:
source: Service Control Manager, category: none, type:error, event ID: 7023,
The SSHNAS service terminated with the following error:
The system cannot find the file specified.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
i've also ran combo fix, the log is attached.
i've reinstalled and updated my drivers, and replaced the PSU, so that shouldn't be the problem. neither my GPU nor any of my cpu cores get over 60 degrees (celcius).