Windows Vista Application Compatibility Update

See Microsoft Knowledge Base Article 932246

The March 2007 Windows Vista Application Compatibility Update is a package of software updates that address common application compatibility issues in Windows Vista. When you try to install and run certain legacy games or applications in Windows Vista, you may experience one or more of the following symptoms:

• The game, the application, or the firmware may not be installed correctly.
• The game, the application, or the firmware may cause system instability.
• The primary functions of the game, the application, or the firmware may not work correctly

This update is cumulative and supersedes update 929427. (This update also includes fixes that are contained in update 929427.) In addition to the fixes that are contained in update 929427, this update improves support in Windows Vista for the following games, applications, and firmware: •Lenovo Presentation Director 1.0.0.1•ACDSee 8•Trend Micro Internet Security 2006 (PC-cillin) 14.0 – 14.59•Trend Micro Internet Security 2007 (PC-cillin) 15.0 – 15.19•Microsoft Windows Server 2003 Service Pack 1 (SP1) Administration Tools Pack•RealNetworks RealPlayer 6.0.12•AOL Safety and Security Center 2.5.4.1•Toshiba Tecra M7 1.70
Note After you install this update, a CD device or a DVD device may not work correctly. If you select the device in Device Manager and then view the properties for the device, you may receive the following error message:

The software for this device has been blocked from starting because it is known to have problems with Windows. Contact the hardware vendor for a new driver. (Code 48)

This problem occurs because a legacy application may install drivers that are incompatible with Windows Vista.

For more information about how to work around this problem, click the following article number to view the article in the Microsoft Knowledge Base:

• 314060You can no longer access the CD drive or the DVD drive, or you receive an error message after you remove a CD recording program or a DVD recording program in Windows XP: "error code 31"