Hi and thanks for reaching out. My name is William. I'm a Microsoft Windows Certified Professional and Systems Administrator. I'll be happy to help you out today.
Outside of attempting a System Restore, there is no ability to revert back to the settings that you had before the sync took place within Windows. To perform a system restore, press Windows key + R > type this command and press Enter SystemPropertiesAdvanced.exe > go to System Protection > System Restore > and select the most recent restore point before the Sync took place.
Note, you will need to disable Windows sync settings to avoid this happening again.