The information applies to:

• Microsoft Windows XP Professional
• Microsoft Windows XP Home Edition

Symptoms:
After you install the Windows XP update that is described in the following Microsoft Knowledge Base article, some program compatibility fixes (also known as "shims") that you have configured may not work:

328310 MS02-071: Flaw in Windows WM_TIMER Message Handling Can Enable Privilege Elevation

Also, if you configure a Setup program to check the results of the InstallShield DoInstall function during a program installation, your program installations may not work because the DoInstall function always returns a non-zero result.

Cause:

This problem occurs because the 328310 package for Windows XP installs an earlier version of the Application Database File, Sysmain.sdb. This file contains both program-matching information and compatibility fixes.

Windows XP Media Center Edition Fast User Switching Hotfix

Download this package if you use Fast User Switching on Windows XP Media Center Edition. This will correct the problem where your Media Center PC may stop responding when you switch between users while watching live TV. For more information about this issue, read Microsoft Knowledge Base Article 811009.

Media Center Solitaire PowerToy for Windows XP Media Center Edition

Microsoft PowerToys for Windows XP Media Center Edition are unsupported, additional programs created by developers after Windows XP Media Center Edition was released to manufacturing. They add fun and functionality to the Media Center PC experience.

The Media Center Solitaire PowerToy for Windows XP Media Center Edition enables you to play Solitaire on your Media Center PC from anywhere in the room using the remote control.