S3cap Service Defaults in Windows 10

Microsoft S3 Emulated Device Cap Driver by Microsoft Corporation.

Default Settings

Startup type:Manual
Display name:S3cap
Service name:s3cap
Service type:kernel
Error control:normal
Group:Video
Path:%SystemRoot%\System32\drivers\vms3cap.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\s3cap

Default Behavior

S3cap is a kernel device driver. In Windows 10 it is starting only if the user, an application or another service starts it. If S3cap fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the s3cap service has failed to start due to the error.

Restore Default Startup Configuration for S3cap

1. Run the Command Prompt as an administrator.

2. Copy the command below, paste it into the command window and press ENTER:

sc config s3cap start= demand

3. Close the command window and restart the computer.

The s3cap service is using the vms3cap.sys file that is located in the %WinDir%\System32\drivers folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 10 installation media.