My computer, it no worky!

[HopAlongBunny]

BIOS update might give you some joy.

Windows updates might make a BIOS update required; ie:some change in the OS changes the way some routine is interpreted by your machine=>causes crash because unable to complete/solve, or overheating due to wasted effort going nowhere. I had to do it once for my motherboard; check manufacturer site for updates; read installation instructions carefully; do as directed :)

http://aps2.toshiba-tro.de/kb0/HTD9502M10000R01.htm lists some updates; don't know if your machine is there

I hope the solution is easy as that; if it's been running for years, it might be a good idea to take it to a good shop and have it cleaned.