For anyone contemplating an upgrade installation to Windows 7, the scenarios below are not supported. -- 95, 98, WinME, XP, Vista RTM, Vista Starter, Win7 M3, Win7 Beta, Win7 RC or Windows 7 IDS -- NT4, Win2K Server, Server 2003, Server 2008, or Server 2008 R2 -- Cross-architecture in-place upgrades (for example, x86 to x64) are not supported. -- Cross-language in-place upgrades (for example, en-us to de-de) are not supported. -- Cross-SKU upgrades (for example, Windows 7 N to Windows 7 K) are not supported. -- Upgrades from Windows Vista to Windows N, Windows K, Windows KN, or Windows E are not supported. -- Cross-build type in-place upgrades (for example, fre to chk) are not supported. -- Pre-release in-place upgrades across milestones (for example, Windows 7 RC to Windows 7 RTM) are not supported. For clarification on the scenarios supported, see M$' whitepaper outlining the upgrade install paths. Jabbering Idiots: Everywhere You Look!

you can upgrade from xp as long as you have service pack 3, and it let me upgrade from windows 7 RC to RTM with no problems.

Thanks for your post. _ windows seven driver forum