S3cap Service Defaults in Windows 8

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
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\s3cap

Default Behavior

The S3cap service is a kernel device driver. In Windows 8 it will not be started until the user starts it. If S3cap fails to start, the error details are added to Windows 8 error log. When the operating system startup is complete, the user is being notified that the s3cap service hasn't been started.

Restore Default Startup Configuration of 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 C:\Windows\System32\drivers directory. If the file is removed or corrupted, read this article to restore its original version from Windows 8 installation media.