I have had my Compaq pc for three years now and everything has been working fine. Then one day a window popped up saying that my vista home premium has expired. Since then my pc keeps crashing every hour or so. Would the fact that my vista home premium has expired cause my pc to keep crashing and keep rebooting itself? If so how do I get around the problem?
'This pre-release version of windows vista home premium will expire in 0 hours.'
I don't know where you got it from but these versions are issued free of charge prior to full release, usually as part of the beta testing process, and are time limited. It is not a true full version of Vista.
Very odd. A well-known High Street retailer selling a pc with a pre-release version of Vista that's still running after 3 years? Did it not have XP on it originally with a Vista demo supplied as an extra? Anyway, in the meantime, try starting in Safe Mode (keep tapping F8 while pc is starting up and select Safe Mode) and scan with Malwarebytes if possible.