Program Compatibility Assistant Service (PcaSvc) Defaults in Windows 10
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.
Default Settings
| Startup type: | Manual |
| Display name: | Program Compatibility Assistant Service |
| Service name: | PcaSvc |
| Service type: | share |
| Error control: | normal |
| Object: | LocalSystem |
| Path: | %SystemRoot%\system32\svchost.exe -k LocalSystemNetworkRestricted -p |
| File: | %SystemRoot%\System32\pcasvc.dll |
| Registry key: | HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PcaSvc |
| Privileges: |
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Default Behavior
Program Compatibility Assistant Service is a Win32 service. In Windows 10 it is starting only if the user, an application or another service starts it. When the Program Compatibility Assistant Service is started, it is running as LocalSystem in a shared process of svchost.exe along with other services. If Program Compatibility Assistant Service fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the PcaSvc service has failed to start due to the error.
Dependencies
Program Compatibility Assistant Service cannot be started under any conditions, if the Remote Procedure Call (RPC) service is disabled.
Restore Default Startup Configuration of Program Compatibility Assistant Service
Before you begin doing this, make sure that all the services on which Program Compatibility Assistant Service depends are configured by default and function properly. See the list of dependencies above.1. Run the Command Prompt as an administrator.
2. Copy the command below, paste it into the command window and press ENTER:
sc config PcaSvc start= demand
3. Close the command window and restart the computer.
The PcaSvc service is using the pcasvc.dll file that is located in the C:\Windows\System32 directory. If the file is removed or corrupted, read this article to restore its original version from Windows 10 installation media.