After years of running Diskeeper, it is no longer on my system. All gone.
After reading that Diskeeper could be the culprit, I just couldn’t get my head around it. However, I did disable auto defragging on the boot drive, and guess what? Restore points do NOT disappear.
As there is no point in defragging my other partitions and drives continually, there seemed no point in having any part of Diskeeper, least of all ‘DKService’ a process which could be invasive at times.
Windows Defragmenter runs now, and if I feel like doing it manually, Auslogics Defrag is fast and efficient..
If Diskeeper resolve the issue in their next version, I may well install it again. Until then, it stays OFF..