[problems with VSS drivers]

I'm dealing with this same issue with Pulseway and Altaro. What did you do to resolve the issue? I tried process above but that did not fix the issue. Thanks

[VSS error with Altaro Backup]

I just started installing Pulseway on a handful of servers on Friday and when my backup solution (Altaro HyperV) ran I received an identical error from all the servers that had Pulseway installed. All other servers backed up normally. A second attempt at a backup on one of these servers resulted in the same error.

Volume Shadow Copy Service error: Error calling a routine on a Shadow Copy Provider {74600e39-7dc5-4567-a03b-f091d6c7b092}. Routine details BeginPrepareSnapshot({3a3f5c6c-b8ea-41e6-9c7c-4395e32eed8e},{6d6dfab3-cbbd-453f-9574-1c9028bc5084},\\?\Volume{72837287-f3cb-11e2-be5a-806e6f6e6963}\) [hr = 0x80070020, The process cannot access the file because it is being used by another process.
]. 

Operation:
   Add a Volume to a Shadow Copy Set

Context:
   Execution Context: Coordinator