Not to worry, it gets cleaned inside and out. :)  I'm familiar with 
memtest, but what is GIMPS?

Martin <ml_news@ddnospamddml1dd.co.uk.dd> wrote in
news:L2Bwc.23$Tp4.12@newsfe6-gui.server.ntli.net: 

George wrote:
[...]

Good thought, but that's not a problem.  Comp gets cleaned once a
month reguarly, since it's in a business environment.  Uninstalled
SETIQueue (which, BTW, I notice the SQ homepage is gone) but still
having problems with SETI hanging.

That 'business environment' means nothing for clean computers.

You may well have the outside of the case nice and clean and shiny.
The inside may well be full of thermally insulating dust, with a fan
choked to a feeble slow rotation, and everything running nicely hot.

If the insides are clean and the fans are working, then next try 
remounting the CPU heatsink with some fresh thermal grease (clean off 
the old stuff first). If still not working, then you've likely got
some capacitors on their way out on the motherboard or in the PSUs.

Try memtest86 to check out the RAM, and the GIMPS torture test to
check out the CPU & RAM.

Silicon runs better the cooler it is.

Good luck,
Martin