Have a Dell Latitude with SSD running Windows 10 Pro version 1809.
Trying to update to Windows May 2021 version but I receive message 'You can't install Windows on a USB drive using Setup'. When I cancel the update, I get MS error code 0XC1900201.
There is no USB drive in the device & I suspect Windows thinks the SSD is a removable USB drive.
I read that the issue is with registry entry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\PortableOperatingSystem.
The Latitude's current entry is '1' and I believe it should be '0'.
Unfortunately I can't find any documentation for this registry entry and before making a change, I'd like to confirm that I don't run the risk of making the computer unbootable, losing installed programs & user files, or causing the May 2021 update to corrupt the current Windows install.
Or is there another resolution to the update issue?