Easiest to wipe the partition is using boot able win installation disk (or other soft that boot able)
Thanks. Yeah I managed to wipe it by booting from the window 7 disk and making the drive 'inactive' via the diskpart command. I then rebooted and ran a Repair Startup a coulple of times. Windows launched and I reformatted the drive successfully.
However it's still screwed. I keep getting the S.M.A.R.T Status error on the drive. It's only a 4 month old drive so it's still covered under warranty. I'm getting a replacement.