My little brother has borrowed a Sandisk Cruzer 16GB from a friend. He thought he’d better clean it well before giving it back to his friend and deleted some u3 file he didn’t know was important. Now whenever we plug the usb device in a Windows 7 pc we get the message “USB Device not Recognized”, there’s no storable drive we can detect anymore. (Tried it on 2 different Windows 7 machines)
I am having a similar issue. I purchased a 32gb Cruzer on Friday to back up some work data while doing a reinstall. It worked over the weekend and even a few hours ago. Now it doesn’t work at all.
If the USB doesn not work on say, 3 computers and all of them are on admin account, pretty much, you need to check on the warranty at this point already.