This post is informational. This issue has existed for Kaspersky Rescue Disk v10 and v18 in Windows 10. It causes Volume Shadow Storage based operations, such as backups in Acronis True Image and Windows System Restore, to fail. When creating a KRD on a USB flash drive, essential upper filter(s) "volsnap" (and "fltsrv") are removed from the Windows Registry key
replacing them with Kaspersky's filter "klbackupdisk". Adding those filters back into the value "UpperFilters" restores VSS functionality:
UpperFilters REG_MULTI_SZ klbackupdisk volsnap fltsrv"
I originally found this solution in an obscure post at Sysnative Forums which specifically named KRD as a common cause. Acronis Help now lists the same solution without mentioning KRD. Again, this message is only informational because I fixed the issue via Regedit.