Clearly there are some very knowlable people who visit this particular forum and offer sound advice. What scares me though, are the likes of
FL310 who seem to be well intentioned, but nevertheless offer such tips as
....... open the case and check all cables inside, all cables from the motherboard, all harddrives, floppy, zip drive etc
look at the dust around the machine, pull the cards and use a smooth brush to clean everything.....yes, everything, take the RAM out etc.
Wow, I find such broard brush statements quite frightening. It's a bit like going in to a flying forum within a computer bulletin board and asking "My aeroplane seems to have a problem, what should I do?" and some jack-of-all-trades says "Get is as high as you can, roll inverted and pull through. If the wings clap hands above your head, I read somewhere that it's probably the main spar."
As I said, there's some good info to be gleened here but If you think your dog is REALLY sick go ask a vet. If you've got an aviation question and you need good advice come here to PPRuNe (Just like the Wannabees and Journos do), but for really problomatic P.C. questions there are many computer-related bulletin boards that are their professional equivalent to PPRuNe.