Control set number
(There is no default value for this entry.)
Identifies a control set , other than the current one, that started the system successfully. The LastKnownGood control set is used as the current control set when a control set fails or the user select the LastKnownGood control set during the boot loader process.
For example, if the value of this entry is 0x1, the LastKnownGood control set is ControlSet001.