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After updating my Microsoft System Center Data Protection Manager 2007 (DPM 2007) to Service Pack 1 (SP1) I received a bunch of errors regarding inconsistency and recovery points creation.

I was looking trough MSDPMCurr.errlog (located in C:\Program Files\Microsoft DPM\DPM) and found following error:

GetDifferentialSoftwareSnapshotMgmt3Interface () failed: (0x80004002)

It appears that Service Pack 1 does not correctly register VSS writer...

After searching around I found solution on Ask The Core Team blog. You need to re-register vss_ps.dll on server.

Solution:

• Run cmd.exe (with administrative privileges in Windows Server 2008)
• Run regsvr32 %windir%\System32\vss_ps.dll
• Restart Volume Shadow Copy service

Link:

• Error 207 - No such interface supported 0x80004002 after installing DPM SP1