Symptoms

• You are creating a full backup of your machine
• The Backup operation is successful with the warning "No mounted partitions were found in the operating system information".

2022-11-26T20:45:14:906+01:00 7200 W000B0471: service_process(9424): Error 0xb0471: No mounted partitions were found in the operating system information. File filters with drive letters or mounting paths will not work.
| trace level: warning
| line: 0xba19e88dc5fea1aa
| file: d:\481\processor\backup\backup_file.cpp:1105
| function: DaProcessor::MountPoints::MountPoints
| $module: disk_bundle_vsa64_30991

Cause

Agent is not able to obtain information about the OS. That's mostly caused by Acronis Managed Machine Service not running under "Local system"

Solution

To resolve the issue, do the following:

1. Run Acronis Managed Machine Service under "Local system".
2. Make sure that Acronis Managed Machine Service user is assigned all the required rights. For more information, check this Acronis Article

More information

If the suggested solution didn't resolve the issue, collect Process Monitor Log during installation, system information from the affected machine, and contact Acronis Support.