The settings in the registry for one or both of the following services are targeting a drive location that no longer exists:
- Veeam Guest Catalog Service (VeeamCatalogSvc)
- Veeam vPower NFS Service (VeeamNFSSvc)
The invalid registry entries often occur because during the initial installation of Veeam Backup & Replication a drive with a larger amount of free space than the C:\ drive was present. This is because the installer will detect which drive has the greatest free space and uses that for the above services. If that driver is later removed, the settings in the registry will still point to that drive. During the future upgrade process, when the upgrade installer attempts to check the existing configuration, it finds that it cannot access that drive location.