Arkroyal
Can't help but think that if you are able to copy your data to another PC. Why not make sure you have everything you need across on the other machine then pop in a new drive into the troublesome machine, reinstall windows then copy your data back.
Uaing Ghost or similar can be daunting, but if you have the ability to transfer the files you already have I think you should be OK.
If not drop back in here.