I've got a usb to serial adapter but can not find a working driver for it. When trying to install the supplied drivers it says they are not digitally signed. I asked the manufacturer and they linked me to the drivers I already had claiming they were digitally signed. Also installation states could not find INF file. Does anyone have windows 7 64 compatible drivers for USB to serial. On a side note, I've had luck with Vista 64 bit drivers for other things with Windows 7 64. Does Windows 7 need separate digital signatures than Windows Vista?