Microsoft KB Archive/308259

= POSIX and OS/2 are not supported in Windows XP or in Windows Server 2003 =

Article ID: 308259

Article Last Modified on 11/5/2007

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APPLIES TO


 * Microsoft Virtual PC 2004
 * Microsoft Windows Services for UNIX 3.5
 * Microsoft Windows XP Professional
 * Microsoft Windows XP Professional
 * Microsoft Windows Server 2003, 64-Bit Datacenter Edition
 * Microsoft Windows Server 2003, 64-Bit Enterprise Edition
 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition
 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Web Edition

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This article was previously published under Q308259



INTRODUCTION
There is no support for POSIX or OS/2 programs in Microsoft Windows XP-based or in Microsoft Windows Server 2003-based operating systems.



POSIX support
The Portable Operating System for UNIX (POSIX) subsystem is not included with Windows XP or with Windows Server 2003. The POSIX subsystem has been replaced with a more UNIX-like environment that is named Windows Services for UNIX. Windows Services for UNIX is a superset of the original POSIX subsystem and provides greater functionality for UNIX programs. Windows Services for UNIX requires Windows XP Professional Service Pack 1 (SP1) or later.

For additional information about Windows Services for UNIX, visit the following Microsoft Web site:

http://technet.microsoft.com/en-us/interopmigration/bb380242.aspx

OS/2 support
The OS/2 subsystem is not included with Windows XP or with Windows Server 2003. An alternative solution for OS/2 programs is Microsoft Virtual PC 2004. Virtual PC 2004 supports most OS/2 programs including OS/2 programs that have a graphical user interface (GUI).

For more information about Virtual PC, visit the following Microsoft Web site:

http://www.microsoft.com/windowsxp/virtualpc

Keywords: kbenv kbinfo KB308259

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