How to disable OneSyncSvc_c523d on Win10?

Question

Noticed that the sneaky Windows had turned on

Service name: OneSyncSvc_c523d

Display Name: Sync Host_c523d

service by setting it on Automatic (Delayed Start). Tried to switch it to Disabled, but it gives a pop-up window saying:

Services

⚠ The parameter is incorrect.

OK

Description says

This service synchronizes mail, contacts, calendar and various other user data. Mail and other applications dependent on this functionality will not work properly when this service is not running.

So it would appear to be completely useless to me. (I'm not even logged on to Microsoft account, so the Settings > Accounts > Sync your settings tab is disabled for me - completely greyed out.)

Answer 1

The easy way to disable the OneSync service (and it's mirror) is to use the Registry.

• Press Windows, type regedit and press Enter.
• Click Yes in the UAC dialog.
• Navigate to Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OneSyncSvc_c523d. N.B. MS may change the suffix for that key, so look for OneSyncSvc_, knowing the last few characters may differ.
• Change the value in Start to 4, which means "disabled". N.B. if you are not an Administrator, or if the key is owned by TrustedInstaller, you may need to change owner and permissions on the key OneSyncSvc_c523d and its subkeys.

Answer 2

Another option is to uninstall Microsoft OneDrive completely, go to

Programs -> Add or Remove Programs -> Microsoft OneDrive -> Uninstall