In Microsoft Windows 10 task manager, I noticed the OneDriveStandaloneUpdater task running, and was curious about it. This led me to the excellent Autoruns application by Sysinternals. Autoruns shows everything that is set to start in any way possible.
Download Autoruns. Using File Explorer, uncompress the folder. In the uncompressed folder, run "Autoruns" application.
In the Autoruns filter box, type: one
Uncheck the box on the appropriate line.
You may additionally uninstall the program (command prompt, then: %systemroot%\System32\OneDriveSetup.exe /uninstall), or rename the program at C:\Users\_username_\AppData\Local\Microsoft\OneDrive\OneDriveStandaloneUpdater.exe