If your PC crashes intermittently, and you’ve ran spyware….first thing to do is

- remove one memory stick and reboot and test. Then remove the other memory stick, reinsert first stick and reboot. 

- remove PCI cards 1 at a time and test. Sometimes SCSI or PCI card clashes cause the PC to crash.

- re-install windows.

If this doesn’t work, then

- backup hard drive or insert new hard drive.  Install windows.

If this still doesn’t work you have a major hardware problem such as motherboard or graphics card.

Swop both until you find the offending part.