It was Spore's DRM. It was the only DRM that was flaky enough to require reinstalling Windows every few months. I finally gave up reinstalling Spore, although I

It was Spore's DRM. It was the only DRM that was flaky enough to require reinstalling Windows every few months. I finally gave up reinstalling Spore, although I did buy it on Steam this year - but I still have not reinstalled it.