What happens if your Windows 7 evaluation period ends? -

Does it uninstall by itself and rollback to Vista or will I be stuck with it and have to buy it?

Hello Doir B- Jeff here with the Windows Outreach Team. Windows 7 will not uninstall on its own come Aug. 1. If you upgraded from Vista to Windows 7, you will need to reinstall Vista over Windows 7. Best, Jeff Windows Outreach Team