Hi After about 10 minutes of use my PC completely cuts out. On rebooting there are no warning messages re the crash and it starts up normally. I am running Home XP and I have replaced the power unit thinking that was the problem. On another note my restore points are not saved and dissappear after one day. don't know if this is related? Any help would be welcome.
It sounds like it could be overheating The MB detects it and shuts itself down Make sure all the fans are working While your in there make sure theres not a build up of dust in the cpu heatsink fins or fans possibly slowing them down Boot up into the Bios and check the Temperature readings as it runs If it climbs very quickly give you an idea thats the problem Re System Restore Go into its settings and tick Turn off system Restore Restart and go back into restore settings and turn it on again see if that helps Also have you done a full Virus/spyware scan as theres some clever bugs that reset system restore making it difficult to get rid of them