This table outlines supported and unsupported upgrade paths for Windows® 7 SKUs.

The table in this document outlines supported and unsupported upgrade paths for Windows® 7 SKUs.

• 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
•    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-build type in-place upgrades (for example, fre to chk) are not supported.
•    Cross-media type in-place upgrades (for example, Staged to Unstaged or Unstaged to Staged) are not supported

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