Recently got a Windows 7 tower click here and I've been having a couple of problems with it, neither of which I know how to replicate.
Firstly it sometimes freezes up very briefly, sound and all, every second or so for a few seconds. I look at the processes tab in task manager and there's no spike so I'm lost.
Second sometimes it won't turn on or wake up, and I need to force it off and cold boot. My friend said it could be the PSU undervolting on the 12V rail, but I've no idea what that means. Initially I thought it was the GPU overheating as it was near a radiator, so I moved it away, but no joy.