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You should locate at least One file (mine is “oem5.inf”, YMMV) that references the files pl2303.cat, ser2pl.sys, and serenum.sys.

Search for text in the files, not file names. If no matches, try the same Search for the text “pl2303.cat”. Search through the files in the “%windir%\inf” directory for the text “Prolific”. WinXP_64 and Win Vista might have different file names) It sounds like you are Stuck, you can not go forward, nor go backwards… What version of Windows? What version of Driver? No matter which version of the driver I use, how I try to install it, I ALWAYS get the same message!Īnyone got any Ideas, have the same problem, etc? The device manager pop-up appeared in the task bar and said “searching pre-configured driver folders…” then “Searching windows update…” then “Installing driver software…” and then I got a message saying “A service section of thin INF is invalid”. I installed the latest Prolific driver and plugged in my cable. Last on the reinstall list was the driver for my cable. I have been able to program the robot in the past, but recently I had to uninstall everything (including the driver for the USB-Serial adapter) and reinstall it all.

Hi, this is essentially the same post that I made in the “Ask the experts” section.