It looks like you’re right. With no other activities, I created a new KRD, then checked the Windows Registry, and the UpperFilters remained unchanged. On a hunch, I searched Google> volsnap site:acronis.com and found agreement in the Acronis Forum that un/installing Acronis products can remove those UpperFilters values with various bad effects. I now believe I had also updated Acronis near the same times as I updated Kaspersky and created new KRDs. Because this thread could appear in search results and add to confusion, it should be deleted.