I had the same issue. I found the root cause after anabling ntfs-audit on file vstscannermaster.exe. The process helper.exe (C:\Users\admin\AppData\Roaming\Microsoft\Windows\Helper.exe) deletes vstscannermaster.exe each time when you start cubase 10. I don’t know why. Maybe it’s a virus or windows security etc…
I deleted helper.exe and all is ok now.
I hope my solution will help you)