ok so update on the problem
i took out the CPU fan and cleaned it with one of those aerosol air spray things. i put it back
i timed how long it took for the computer to turn off and its now down to 21 seconds.
i havent added any hardware or software
the problem has only been happening for about 3 or 4 days but is now much worse
im running XP Pro
intel 3.2ghz
1gb RAM
cant remember what mobo.
not sure if this is relavant but i clicked on a link of Facebook and firefox told me that it was a dodgy link and wudnt let me go to it.......?
i hav no idea what is going on
oh and when i turn it on, there are some noices, not loud which were definately not there before, just before it turns off
i cant even access thr bios to see if something is running too hot!
HELP!!!