On my Windows 10 Pro guest I have "file" named Windows 10, 0 bytes, which isn't assigned to any application (no extension) and which also cannot be moved to the waste basket. Strange.
Hello @ChristophK2 , please share a screenshot of the file and also let us know what happens when you move it to trash. Thanks
It jumps out of the trash. But I believe the reason was that it was a relict of the Windows VM that I deleted. I was with one foot in an xterm in the directory that I had previously deleted. I have deleted the VM again and reinstalled Windows 10. Now the file is gone.