iphone 4s USB device not recognized

I've not had any issues until now. I'm on a 64bit Windows 7 PC. Iphone 4s. Recently transfered pictures from the phone to the pc. After that time it will not recognize the iphone at all. I get the error "USB device not recognized." I followed the article listed here: http://support.apple.com/kb/TS1538 but it's still not working. I have done a soft reset on the phone and a hard reset, no dice. The phone connects fine to any other computer except this one. I have also attempted to delete all device drivers and reinstalled them to no avail. Please help!