Thanks for the quick replies.
I ran scannow and it found no problems
I booted from the dvd into repair. The first thing it did was
claim an error starting up that it fixed. I restarted and ran
the startup repair again and it passed.
HD is Toshiba who dont provide diagnostics as far as I can see.
I will burn a dvd and run memtest in the next few days.
Bios is A14, 07/12/2009, I started out at Dells website with
the service tag to find what drivers
I was missing.