Laptop is 2 yrs old. NO dust to speak of. Odd that it would just stop working but I consistently get a "no physical memory error" when I try it with the 2 gig and 1 gig chip in at the same time, or just with the 2 gig by itself. If I run it with the 1 gig chip only I can't boot into windows but diagnostics show no problems with memory, hard drive, etc. as mentioned

If it doesn't solve the problem I can return the ram.

As a last resort one of the I.T. guys at work said he'd take a look at it.

-David