1. You try to install Acronis Backup onto a machine which is running in a Parallels Virtuozzo Container;
2. An attempt to install Acronis Agent for Windows errors out with the following message in MSI installation log:
MSI Log Cut
1: MSI_TRACE(fltsrv): HiddenStorageFilterMgmt2116::TakeApiControl failed with status 0xE0000001
1: MSI_TRACE(fltsrv): Service fltsrv has been started with status 1275
1: MSI_TRACE(fltsrv): Failed to install: status 1275.
1: MSI_TRACE(fltsrv): Action handler failed with status 1275.
1: MSI_TRACE(fltsrv): Operation failed with status 1275
CustomAction _USRCUSTACT_MsiFltSrvInstall_fltsrv_component returned actual error code 1603 (note this may not be 100% accurate if translation happened inside sandbox)
This is a known compatibility issue of Acronis Backup and Parallels Virtuozzo Containers. Installation of Acronis Backup Agent in Parallels Virtuozzo Containers is not supported.
There is no workaround at the moment.
Acronis Backup Service supports Parallels Virtuozzo Containers.