USB modem driver USBSER.SYS does not install on Windows 7 64-bit Enterprise Thanks for any help.įrom: ( Link to thread, scroll down for post): If this is a dead end for Vista and Win 7, what can I do to salvage my embedded code and PC side application? What kind of driver model should I be looking at? I just need something that will still let my USB device look like a comm port to Vista/Win 7 and all will be fine. I know that this is not a signed driver and that it uses usbser.sys which is problematic on Vista.Ĭan anyone tell me if what I am trying to do is even possible? Better yet, can you provide a link to a working INF file and/or explanation of a fix? I have searched the web for days and have not come up with anything that actually works. I have an INF file based on one that I got from Atmel that works with XP but when I try to install my device on Vista-64 Home Premium or Win 7 64-bit. It shows up as a COM port and I can communicate with it using my PC application. I have USB CDC ACM device that works correctly on XP.