New
#31
If it's a temperature issue, not ever turning it off would be worse...
linnemeyerhere already advised on good cleaning...
Now it's known that SFC finds errors and can't fix all of them, right?
Assuming malware has been eliminated as the cause, I would try a Startup Repair
If that doesn't help, I would try Repair Install
If I still had problems I would Clean Reinstall - Factory OEM Windows 7 before giving up on the PC...