I created a Windows 10 bootable USB flash drive using the instructions on this site. After the download finshed, it verified and then created the Windows 10 installation media. The next screen was Your USB Flash Drive is Ready so I clicked on the Finish tab. A screen then showed briefly saying something along the lines of Cleaning Up Files...This may take several minutes. After five seconds the screen disappeared. Are you supposed to remove the USB flash drive as soon as that screen has disappeared or are you supposed to wait several minutes to see if another screen comes up to say the Clean up of files process has finished? I wasn't sure what to do? Has everybody else seen this Cleaning Up files screen?