Failed to access the shadow volume. Error (2147549183): Catastrophic failure

This error (0x8000FFFF) occurs when running a scheduled profile using the backup operator and if the VSS service has not been started or other software has cause VSS to stop working. Some users have also reported that the same error can arise because of the issue reported here and may result in Event Log entries with ID 6004: 


1. Restart the following services: COM+ Event System, COM+ System Application, Microsoft Software Shadow Copy Provider, Volume Shadow Copy

2. Change the startup type of the Volume Shadow copy service to 'Automatic' (right click on Volume Shadow Copy > Properties > set the 'Start type' to 'Automatic') and reboot the computer.

3. Open a command prompt and run the following commands:

cd /d %windir%\system32
net stop vss
net stop swprv
regsvr32 ole32.dll
regsvr32 oleaut32.dll
regsvr32 /i eventcls.dll
regsvr32 vss_ps.dll
vssvc /register
regsvr32 /i swprv.dll
regsvr32 es.dll
regsvr32 stdprov.dll
regsvr32 vssui.dll
regsvr32 msxml.dll
regsvr32 msxml3.dll
regsvr32 msxml4.dll
net start swprv
net start vss  

4. Reboot the computer

5. Test the backup