First I clone my HD via Clonezilla. I now have a clone of my original HD
Reformat my dead comp
Plug my Ubuntu thumb drive into my reformatted comp and use it to boot/run my reformatted comp
With Ubuntu as my running OS, plug my cloned HD in and run in so that I can either copy out my stuff into the reformatted source HD or delete the corrupt Windows from the target HD clone. (Can this step be done? Using Ubuntu to run a clone image that has Windows on it?)
After all, if I boot my PC in Ubuntu before reformatting, I can still access my HD's stuff to backup, run whatever etc even though it has Windows on it no? Isn't this just doing the same except now you have reformatted the comp and are transfering stuff from the clone back into your original HD?