Symptom
When a backup completes, you may encounter a Windows event log similar to the following:
Volume shadow copy service error: Unexpected error on routine call
IVssAsrWriterBackup::GetAsrMetadata. hr = 0x80070001, Incorrect function.
Operation:Event PrepareForBackup
Cause
The issue (event ID 8193) may be caused by an invalid entry inside the following registry subtree:
Hkey_Local_Machine\Software\Microsoft\Windows NT\CurrentVersion\ProfileList
Solution
- Open the Registry Editor (regedit).
- Expand into the abovementioned subtree and check within it if there is an entry that has a .bak value appended. If so, this may be causing the failure when trying to resolve the SID of the writer.
- Backup the registry key first, then delete the entry with the extra .bak value.
- Reboot the machine to check if the issue has been fixed.
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