I have a program which I tested a few months ago, it worked.But now,I retest it on my Win 7. It didn't show the Blocking Reason. The program address is : http://pixelstech.net/download/index.php?item=26. Hope those who have Win7 installed help me to test it. What you need to do is 1) Download it;2) UnZip it 3) Run it.4).Plug in a USB device.4) Try to log off the system, see if the system is prevented to logoff with a block reason like "One or more ...".
The basic idea of this program is to help those who frequently forget to plugout USB drive when they log off or shut down the system, especially for those who use library's computer, to remember plug out their USBs before log off or shut down the system. I swear to God it's not a virus.
You can put your test result after this thread. Thank you very much.