Trying to fix: "Volume Shadow Copy Service operation failed" (0x80700A1)

H

highstream

Win 10 Pro x64 2004. I run a System Image Backup via File History every week or so, and did so after installing 1904 last week. Now it's failing. Yesterday before that, I swapped in a new nonsystem backup HDD that had been cloned previously and reestablished some drive letters (and rebooted). In running the backup, I'm getting a "Volume Shadow Copy Service operation failed" error, with a note to check VSS and SPP events (error 0x807800A1). Here's what I've done so far without success:


- run Macrium Reflect VSS fix tool

- changed VSS to automatic in Services

- disconnected the swapped in HDD

- turned off Windows Defender Firewall and MBAM Premium

- switched the boot drive from GPT to MBR (now back)


What's left? Thanks,


Here are some screenshots of the error messages and from the first VSS and SPP listings in Event Viewer:



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