Problem: Vista SP1 pre-release error “Your Windows License will expire”
A user who installed pre-release build of Windows Vista Service Pack 1 (SP1) may experience a message stating “Your Windows License will expire in X days”.
Uninstall SP1 from the system before the expiration date shown.
1. Click Start, and then click Control Panel.
2. Click Programs.
3. Click Programs and Features.
4. Click View installed updates.
5. Click Service Pack for Microsoft Windows (KB936330).
6. Click Uninstall.