Still me, adding more info to this problem. My laptop and my husband's desktop both have Windows 10. The HD worked fine on Windows 10 before unplugging for the move. Tried it on my boys' older Windows 7 desktops and same problem, so I guess not a Windows problem. NEW addition to this problem = I also have a WD passport which is my backup to the MyBook. I waited an hour to plug that one in, because I simply couldn't take the stress if it didn't work either. IT ALSO DOESN'T WORK!!! The passport is not recognized at all by any of our computers - says installing driver software, then says error, not installed correctly. So, now I have my day-to-day WD MyBook which is recognized by all computers but says folder is empty. And my WD passport, which is my backup of EVERYTHING, which is now not recognized by any computer. Is it possible we built our house on an ancient graveyard?!?!?!?