Yes, I have encountered that many times. This PC hasn’t had an active internet connection since I’ve owned it though, so the only drivers it has are the ones it shipped with or anything I add via flash drive/CD/floppy etc. The prolific ribless cable I had was plug and play, worked great until when 1225 RSS started acting up and I went to give it another try… “No driver found”. And I went to manually select one and “the device failed to start.” I will have to make a driver CD and fight with it again today. The counterfeit-chip-intentionally-broken-driver issue with Prolific stuff only affects Windows 10/11 in my experience. The annoying thing is it also affects legitimate PL-2303 chips as well.There was a fake set of Prolific serial to usb chips sets floating around a few years ago.
I think Prolific did a change to the drivers to make sure the fake chips would not work and that caused some issues. Maybe a driver roll back would help.
Thank you. That is some useful info. So sounds like they never had a DOS-only 1225 RSS. That slightly sucks for me, since the only capabilities I have are plain DOS, Windows 2000/XP, and 10/11. Might have to install Windows 95/98 and try from there. Fortunately, the customer is not on a tight timeline at all- he says as long as they're back by spring he's happy. The DOS/Windows 2000 computer is a 1997 or so mid-tier Dell workstation, the Windows 10/11 are a 2021 Lenovo ThinkPad and a tower I built a few months ago. I forget the exact specs of the Dell. But it probably would not run XP so well. I had a Windows 95 and an XP laptop but they fell victim to cold solder joints that I could not find.The earliest 1225 I have is WIN 98 which without the GUI is DOS 7.10. I *think* there might have been a WIN 95 version. I have experienced the trouble you are having with a few radio/rib/computer combinations. And I found 1225 to be one of the most unstable. I run the WIN 98 on a TOUGHBOOK running ver 3.2 build 7 CPS and on WIN XP version 4. I also have that "reads once then won't work until a reboot" problem with SM120. Good luck.