About a week ago I formated my PC, installed Windows 7, then installed all the Windows Updates, then installed drivers, then installed Kaspersky Internet Security Trail. I thinking of buying this program, but whenver I run a scan, my PC gets shut down mid way through scan. This is very bad, please help me. Or would I just be better off uninstalling and finding another anti virus?

Welcome. Circumstance of situation and symptom are indicative of overheating. Please check your cooling solution: Fans spinning, thermal paste is ok, no hair blocking air vents, etc. Any better after that? If still no go, please post your GetSystemInfo report link, instructions: https://support.kaspersky.com/common/diagnostics/3632 Please upload the GetSystemInfo zip folder that is inside the larger GSI zip to the GSI parser site http://www.getsysteminfo.com/ and post the url to the parsed report here, in your next post.

I just got [another AV] instead. I can now do scans without my PC getting shut down. It seems like a much better and smoother program.