Lucky Professional
What can I do if I can’t create a new folder in Windows 10?
- Press Win + R to bring up a Run dialog.
- Type regedit and click OK.
- In the Registry Editor window, navigate to Computer > HKEY_CLASSSES_ROOT > Directory > Background > shellex > ContextMenuHandlers.
- Right-click anywhere on the empty space on the right pane and select New > Key.
- Name it the newly created key New Key
- Select the new key, right-click Default and select Modify.
- In the Value data field, enter {D969A300-E7FF-11d0-A93B-00A0C90F2719} and press OK.
- Restart your computer and check if you can create a new folder.
Source: https://www.makeuseof.com/cant-create-new-folder-in-windows-10-how-to-fix/