I see in multiple postings that people are having an impossible time to truly remove Macrium after it is installed. Even suggestions to reinstall and then uninstall fail.
Under System -> Notifications & actions, I see Macrium Reflect .. set to off, but this started my examination of my Thinkpad Carbon X1 Touch Windows 10 Pro x64 PC. I had briefly tried, and uninstalled, Free Macrium almost a year ago, and I recall that it had set up sort of a dual boot on the startup screen. I think it is still there, and as far as I am concerned it is software getting older and riper for trouble later. I cannot find any traces of Macrium on my PC, e.g., using my locate under Cygwin running as Administrator.
I went into the Registry with regedit and removed one macrium folder, but two others could not be removed, even after a reboot. I also ran CCleaner, but it did nothing.