My daughter had her thumb drive plugged into my desktop, doing some work. She finished, logged off of her account and I logged into mine. I noticed that she left her thumb drive in the USB port, and so I tried to safely eject it, but I get the following message:
Problem Ejecting USB Mass Storage Device
This device is currently in use. Close any programs or windows that might be using the device, and then try again.
OK, I give up. I just logged into my account and the first thing I did was try to eject her thumb drive. What in heck is currently using it? I don't have anything else opened/running when I got that message. How do I determine what program is apparently running and doing whatever it is, against that USB drive? How do I get whatever it is, to stop so I can safely disconnect the thing?