ISP said they're shutting me off!



I do this also. Or use Linux with vmware


I make an image copy of my os after I've installed it and have installed all the important programs I use. I shrink the partition to just be big enough to hold what's on it then I make the copy.
Whenever I want a clean install I just format and copy the image files to the c drive partition. I disable system restore although I'm not sure if relying on system restore would be just as good(it might require a bit more disc space, though).
It's a pretty painless process(a lot easier than actually reinstalling) and gives you peace of mind.
I guess when you can reinstall without actually reinstalling it makes you biased towards giving advice like "just fucking reinstall".