batcmd.com Windows Vista Services

Program Compatibility Assistant Service - Windows Vista Service

Provides support for the Program Compatibility Assistant. If this service is stopped, the Program Compatibility Assistant will not function properly. If this service is disabled, any services that depend on it will fail to start.

This service also exists in Windows 10, 7 and 8.

Startup Type

Windows Vista edition without SP SP1 SP2
Starter Automatic Automatic Automatic
Home Basic Automatic Automatic Automatic
Home Premium Automatic Automatic Automatic
Business Automatic Automatic Automatic
Ultimate Automatic Automatic Automatic

Default Properties

Display name:Program Compatibility Assistant Service
Service name:PcaSvc
Type:share
Path:%WinDir%\system32\svchost.exe -k LocalSystemNetworkRestricted
File:%WinDir%\System32\pcasvc.dll
Error control:normal
Object:LocalSystem
Privileges:
  • SeDebugPrivilege

Default Behavior

Program Compatibility Assistant Service logs on as LocalSystem and runs in a shared process of svchost.exe. If Program Compatibility Assistant Service fails to start, the error is recorded into the Event Log. Windows Vista startup proceeds, but a message box is displayed informing you that the PcaSvc service has failed to start.

Dependencies

Program Compatibility Assistant Service will not start, if the Remote Procedure Call (RPC) is stopped or disabled.

Restore Default Startup Type for Program Compatibility Assistant Service

Automated Restore

1. Select your Windows Vista edition and Service Pack, and then click on the Download button below.

2. Save the RestoreProgramCompatibilityAssistantServiceWindowsVista.bat file to any folder on your hard drive.

3. Right-click the downloaded batch file and select Run as administrator.

4. Restart the computer to save changes.

Note. Make sure that the pcasvc.dll file exists in the %WinDir%\System32 folder. If this file is missing you can try to restore it from your Windows Vista installation media.