More seriously, are you getting BSODs? Please provide your complete system specifications, as well as what you are doing when it happens. Include the brand and model (not just wattage) of the PSU.
It happens on my desktop computer and laptop. I run intel core i5 and i3(laptop) 64bit and 32bit. The wattage of the desktop computer is 550 (enough) and a Radeon 5850. I don't get BSOD.
This screenshot is when i just installed fonts to my computer , happens on my computers when i do an action like that like renaming a file , open etc..l.