Compatibility Guide

This guide provides a comprehensive overview of which Windows Update versions are compatible with specific legacy operating systems.

 Compatibility Table
Supported
Partial
No
Version 95 NT4 98 Me 2K XP
WU V2 Yes Yes Yes No No No
WU V3.1 Yes Yes Yes Yes Partly No
WU V4 No No Yes Yes Yes Partly
WU V5 No No No No Partly Yes
WU V6 No No No No Yes Yes
MU No No No No Yes Yes
Note: Based on original MS support cycles.
WU refers to Windows Update and MU refers to Microsoft Update.
 External Resources
Legacy Update offers a compatibility table listing newer systems. View the table here.
 Server & Embedded Mapping
Server Mapping:
  • NT Server 4.0: Matches NT 4.0
  • 2000 Server: Matches Windows 2000
  • Server 2003: Matches XP
Embedded Mapping:
  • NT 4.0 Embedded: Matches NT 4.0
  • XP Embedded / POSReady: Matches XP

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