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Guide with video - https://www.majorgeeks.com/files/details/remove_quick_access_in_windows_10_file_explorer.html
Backup your registry - https://www.majorgeeks.com/content/page/how_to_back_up_or_restore_the_windows_registry.html

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To remove Quick Access in Windows 10 File Explorer, double-click this registry file and you're all set.

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To restore File Explorer, open the Registry Editor and copy and paste:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer 

into the search bar at the top. 

Right-click on HubMode and choose delete
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