Windows 7 Upgrade Paths (Supported and Unsupported)

Microsoft Downloads - Windows 7 Upgrade Paths

“Outlines supported and unsupported upgrade paths for Windows 7 SKUs.

File Name:	Windows 7 Upgrade Paths.doc
Version:	July 2009
Date Published:	7/20/2009
Language:	English
Download Size:	109 KB

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From the above document;

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Windows 7 Upgrade Paths

This document outlines supported and unsupported upgrade paths for editions of the Windows® 7 operating system.

Unsupported Upgrade Scenarios

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-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.

Supported Upgrade Scenarios

From Windows Vista (SP1, SP2)	Upgrade to Windows 7
Business	Professional, Enterprise, Ultimate
Enterprise	Enterprise
Home Basic	Home Basic, Home Premium, Ultimate
Home Premium	Home Premium, Ultimate
Ultimate	Ultimate

 

From Windows 7	Upgrade to Windows 7
Enterprise	Enterprise
Home Basic	Home Basic
Home Premium	Home Premium
Professional	Professional
Starter (x86 only)	Starter (x86)
Ultimate	Ultimate

 

From Windows 7	Anytime Upgrade to Windows 7
Home Basic	Home Premium, Professional, Ultimate
Home Premium	Professional, Ultimate
Professional	Ultimate
Starter	Home Premium, Professional, Ultimate

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Short and to the point…