My PC (which was supposed to expire a few hours ago) just shut down.
I thought this was because of the "shutdown hell" thing (where it will shut down repeatedly every 2 hours), but instead, I try to boot it back up, and get a "Missing Operating System" error from my BIOS.
Basically, if you're still running Windows 7 Build 7100 (RC), expect this to happen to you, don't expect to be able to use it after yours expires.
If I didn't have an external HDD from my ThinkPad with Ubuntu on it, I would pretty much be screwed.
Discuss.