If you still have the Windows 7 Beta installed, today is the day when it starts shutting down every two hours. You know, to annoy the hell out of you.
https://gizmodo.com/reminder-windows-7-beta-will-start-shutting-down-on-yo-5287086
So go and get the Windows 7 Release Candidate. That one will start shutting down every two hours in about a year.
https://gizmodo.com/windows-7-rc1-will-auto-shut-down-every-two-hours-mont-5240677