Thank you for responding Vincent. The label on the bottom says "Model PCG-7185L"
The label at the bottom right of the display reads "VGN-NW250F".
So I'm not sure what this is. The stickers on the keyboard say "Intel Core Duo inside" and "Windows 7"
Service Tag is C6021JQ7. The Microsoft label says "Windows 7 Home Prem OA Sony Corporation".
The hard disk (WD320) was totally wrecked so I am starting from nothing with a new hard disk blank. My son could not lay his hands on the system disks or anything, as he had recently moved.
Any advice will be gratefully received.
chromian