I have two flash drives that work fine in my little notebook running Windows 7. They aren't showing up in my Dell laptop. I went to Device Manager and found the yellow triangle with the exclamation point at USB Mass Storage Device. When I clicked on it, I got the following: I deleted the USB Mass Storage Device line and tried to use it again, but it still won't work. I recently moved to Windows 10, but I recall seeing an occasional pop-up on my desktop about a problem with that USB port. It still worked, and the pop-up disappeared as fast as it came on, so I didn't know what to do then. That preceded the move from Windows 8.1 to Windows 10. Short of resetting my machine, is there something less radical that'll work? The two flash drives are an older Mushkin Enhanced (32 GB) and a new Corsair Flash Voyager Slider XI (256 GB). My Dell laptop has three USB ports. The two on the left are occupied (wireless keyboard and wireless mouse). There's only one on the right, and that's the one with problems. Thanks for any help you can give me.