On my desktop at home, the only reason I boot Windows is Team Fortress 2. Lately Windows Genuine Advantage has been telling me that my Windows is illegitimate. I get a black screen with a notification that says I need to validate my license blah blah blah.
I could locate my Windows key, try to validate it, call Microsoft, whatever, but really I can't bothered. What's the worst that can happen to me if I ignore the WGA message?