Are you trying to upgrage your Vista system by upgrading or clean install? What version of Vista do you have, Premium, Ultimate, Home basic or Business, 32 or 64 bit? Where did you get your copy of Win 7?
Upgrades to Windows 7 from the following operating systems are not supported:
Upgrades to Windows 7 from the following operating systems are not supported
- Windows 95, Windows 98, Windows Millennium Edition, Windows XP, Windows Vista® RTM, Windows Vista Starter, Windows 7 M3, Windows 7 Beta, Windows 7 RC, or Windows 7 IDS
- Windows NT® Server 4.0, Windows 2000 Server, Windows Server® 2003, Windows Server 2008, or Windows Server 2008 R2