The symptoms you describe could be symptomatic of a variety of things to include hardware/software issues, overheating caused by a failed processor fan, bad memory (RAM), failing or underpowered power supply, CPU overheating, motherboard, video card, faulty or unsigned device drivers, CMOS battery going bad, BIOS and firmware problems, dirty hardware components, programs hanging or unresponsive in the background, and even malware. If the computer is overheating, it usually begins to shutdown/restart on a more regular basis.
I have seen this error related to the Spyware.Service.MiscrosoftUpdate (Trojan) rootkit
. Some rootkits can trigger BSODs, shutdowns and various stop error/shutdown messages so it would be wise to perform an anti-rootkit scan to at least investigate that as a possible cause
Also see STOP 0x00000050 PAGE_FAULT_IN_NONPAGED_AREA
for non-malware explanation.
Edited by quietman7, 22 May 2009 - 08:45 AM.