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[Fixed] Acronis True Image: unable to select a disk for new backup, already configured backups fail, if volsnap is missing from UpperFilters in the system registry

Symptom 1

Entire PC or Disks and partitions backup fails with error "The operation was terminated because no Volsnap driver was found."

Symptom 2

Entire PC backup interrupts with message "Source is not selected. The operation has been terminated".