ErrorControl Values

These are the possible ErrorControl values in the Registry key HKEY_LOCAL_MACHINE\SYSTEM\<control set>\Services\DriverName:

• Ignore (value 0x0) — If the device driver fails to load or initialize, startup continues with no warning message.

• Normal (value 0x1) — If the device driver or service fails to load or initialize, startup continues after displaying a warning message. Most device drivers and services have ErrorControl set to this value.

• Severe (value 0x2) — When the Kernel detects an error in this device driver or service, it switches to the LastKnownGood control set, and the startup process starts again. If the control set being used is already LastKnownGood, the error is ignored and processing continues.

• Critical (value 0x3) — The same procedure as Severe is used, with the exception that if the LastKnownGood control set is already being used, the startup process stops, and a failure error message is displayed.