If you get the following error message in the event log:
Volume Shadow Copy Service error: A critical component required by the Volume Shadow Copy service is not registered. This might happened if an error occurred during Windows setup or during installation of a Shadow Copy provider. The error returned from CoCreateInstance on class with CLSID {e579ab5f-1cc4-44b4-bed9-de0991ff0623} and Name IVssCoordinatorEx2 is [0x80040154, Class not registered
Event Source: VSS
Event ID: 22
This is because you’ve installed ShadowProtect and not rebooted the computer. To fix this, reboot the computer.