Prevent Microsoft Sync from running at Startup

Using x64 Windows 10 (build 17763.1098). Whenever the computer starts up, quickly load Task Manager and Microsoft Sync Center (Mobsync.exe) briefly runs before shutting down. Is there any way to stop this altogether?

All of the following are done and confirmed:

• HKLM\SYSTEM\CurrentControlSet\Services\CscService\Start is 0x00000004

• HKLM\SYSTEM\CurrentControlSet\Services\CSC\Start is 0x00000004

• The Control Panel\Control Panel\Administrative Tools\Service\Offline Files service is disabled, as expected

• Local Group Policy (gpedit.msc) > Computer Configuration\Administrative Templates\Network\Offline Files\Allow or disallow use of the Offline Files feature has been configured to "Disabled"

• The computer has been rebooted multiple times

According to a comment in this link describing how to disable Offline Files, this may be a bug in Windows itself. That article and comment are from a year ago in May 2019, so it is possible the bug has not been addressed.

Update

I've taken the drastic step of renaming the mobsync.exe file in C:\Windows\System32 and C:\Windows\SysWOW64 to mobsync-orig.exe. Naturally this "resolves" the issue, but it would be better if there were a more elegant solution.

Note: To rename these, you need to take ownership of the file from TrustedInstaller with Properties > Security > Advanced > Change. Then add Full Rights to the local Administrators group.

More elegant way;

New-Item -Path "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\mobsync.exe" | New-ItemProperty -Name Debugger -PropertyType String -Value "%windir%\System32\systray.exe" -Force

Modifying files will corrupt the windows integrity check and (especially anti cheat systems) don't like this.