Followed the advice from here and my mates laptop seems fine.
Cheers
I wouldn't follow kev's bit now having seen it in action. Upgraded a machine for a friend, including motherboard, processor and memory. The backplate was a slightly different design, meaning restricted access to the sound ports. I caught him hitting it really hard with a hammer (with a HAMMER)
and a 'special screwdriver' to free up some space for the ports. It had AVG and superantispyware installed, but these failed to protect from the hammer attack.
The PC is no longer working. Strange that. He asked me if it was maybe a hard drive issue.