There is a known issue with motherboard capacitors which could evoke your message and post. Can you inspect the motherboard and see if the motherboard capacitors look like these (bad ones?)

http://www.pcstats.com/articleview.cfm?articleID=195

What I see is that the machine will have many failures until it warms a little.

The other issue can be an old or overtaxed PSU would do the same. How about some machine description and how many Watts is the power supply rated for?

------------------------

About SCANDISK. I have a full article about that, but most will not want to do all that work so the easy answer is to SCANDISK by booting into SAFE MODE.

Bob