I have a Microsoft fingerprint reader. I had to do a full install of Windows 7, so I have to reinstall everything. I reinstalled the fingerprint reader software, but it won't let me register my fingerprints. First it wants me to put in my Windows password and I don't have one (it's never asked me for this before), so I just ignore it and click next. When I click on the fingers to register each one, it won't take.