Message: The shadow copy provider had an unexpected error while trying to process the specified operation
I am working an issue with backups and them failing due to issues with the VSS service.
Please see attached screenshots to see error log.
I think I can use one of the following kb articles but not 100% sure.
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top.of_.error_.list_.jpg | 3.88 MB |
bottom.of_.error_.list_.jpg | 3.39 MB |

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Able to backup successfully with VSS disabled, unable to set System Provider as VSS service.
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Attaching latest error reports using the following steps:
Error1 - deselecting the d drive from the backup settings and leaving vss on in auto
Error2 - VSS to software-system provider and left the d drive in the back up setting
Error3 - vss system provider and d drive out of the back up setting
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279330-120481.txt | 6.64 KB |
279330-120484.txt | 6.63 KB |
279330-120487.txt | 6.63 KB |
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Site is going to attempt kb 22373 and the registry edits.
Also reporting that the VSS selections are Enable or Disable only
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Hi Chris,
- Select System Provider in the VSS settings;
- Make sure that there is sufficient free space on each volume for shadow copies (Troubleshooting part, 1.2)
- VSS writers should be enabled and in consistent state: Go to Start -> Run -> cmd. Execute the command: vssadmin list writers. If any errors, please contact Microsoft Support.
Thank you,
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Site attempted the article and stopped at the registry changes with the following note:
'The file listed below was not in the registry for DC2'
delete the Acronis VSS Provider from the registry:
• regedit -> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\VSS\Providers\
• navigate to the key {f782463b-33bb-4043-ad8d-60b728d26a6c} - it's Acronis VSS Provider
• export this key and then delete it
• (!) Do not delete the second key, it's Microsoft VSS Provider.
Why would there not be an Acronis VSS registry key and how do we recover the key to that location?
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