HAHAHAHA sorted,i got a TOSHIBA A30 and it shut down under high load {trying to reistall windows...and it always shut down,infuriatingly around 98%complete..anyhow,i jacked the machine up on books to let air get in easier me thinks...and it completed ,great !} BUT now hang on a minute,why am i sitting it on books ???,so of to google and on to here...what?,heatsink?,dust? aha...10 mins later...back to opening line ...hahahahahahahaha. yup it worked,well,really well.Now somone deserves praise indeed .cheers!