batcmd.com Windows 11 Services

Program Compatibility Assistant Service - Windows 11 Service

This service provides support for the Program Compatibility Assistant (PCA). PCA monitors programs installed and run by the user and detects known compatibility problems. If this service is stopped, PCA will not function properly.

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

Startup Type

Windows 11 version Home Pro Education Enterprise
21H2 Automatic Automatic Automatic Automatic
22H2 Automatic Automatic Automatic Automatic
23H2 Automatic Automatic Automatic Automatic

Default Properties

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

Default Behavior

The Program Compatibility Assistant Service is running as LocalSystem in a shared process of svchost.exe. Other services might run in the same process. If Program Compatibility Assistant Service fails to start, the error is logged. Windows 11 startup proceeds, but a message box is displayed informing you that the PcaSvc service has failed to start.

Dependencies

Program Compatibility Assistant Service is unable to start, if the Remote Procedure Call (RPC) service is stopped or disabled.

Restore Default Startup Type for Program Compatibility Assistant Service

Automated Restore

1. Select your Windows 11 edition and release, and then click on the Download button below.

2. Save the RestoreProgramCompatibilityAssistantServiceWindows11.bat file to any folder on a local drive such as SSD or a hard disk.

3. Right-click the downloaded batch file and select Properties.

4. Check the Unblock checkbox and click OK.

5. Right-click the batch file again and select Run as administrator.

6. 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 11 installation media.

Yea, though I walk through the valley of the shadow of death, I will fear no evil: for thou art with me; thy rod and thy staff they comfort me.