Thanks Allan,
Lost external hdd, so all backups gone.
Now have a new motherboard, new processor, and new sata hdd's. They had to copy the info from my old ide hdd to the new sata drive, but of course had to install Windows first and as l only had the upgrade disk, that's where the problems started.
I've nearly got back everything to how it was, but l've got a big head with IE8 and also this keyboard. Just wodered whether anyone had any ideas as to why the keys weren't working as they should.