Windows Vista Program Compatibility Assistant – PCASVC.DLL

Pcasvc.exe installs as part of your Windows Vista operating system. You'll find it in your Windows\System32 folder. It is the Program Compatibility Assistant Service. The Program Compatibility Assistant detects known compatibility issues in older programs. After you have run an older program in this version of Windows, it notifies you if there is a problem and offers to fix it the next time you run the program. If the compatibility issue is serious, the Program Compatibility Assistant might warn you or block the program from running. If that happens, you'll have the option to check online for possible solutions.

You'll find more information and a handy FAQ at http://windowshelp.microsoft.com/Windows/en-US/Help/82c0440d-553e-47e9-b4bd-6c2d10df4de71033.mspx. We'd recommend leaving this file in place.

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