its in use right now...but u dont have any open window or any active file transfer...
I found one cool way to do this.
- from task manager end the explorer.exe process.
- now your every open window & desktop icons & taskbar should be gone.
- from task managers File>>New task(Run..) start the explorer.exe again..
- your desktop & other related views will appear again.
Now you will be able to safely remove your hardware.