No, this product is not compatible with vista 64 bit. I had the same problem with the drivers not working on Windows 8. I have a Belkin F5U which is now working on my laptop Windows 7 thanks to your advice. Will be back on payday to donate. You save me a lot of hassle. Thanks a million for sharing!!!

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Mark C Woodbury said. Well, all is well now! I called the number and was sent to India for support.

GT Config Lite – Win7 64 bit – Belkin F5U409 Serial-to-USB adapter

Are you aware of wundows May good fortune follow you for the rest of your days. Looks like the fsuu409 needs to be different or edited to exactly match the hardware.

Benji said, Thank you! Thank you for the post, I utilize my Belkin USB to Serial adaptor daily and didnt want to buy another piece of hardware to get things done. My desktop died and I was forced to get a newer machine with Windows 7.


Matt said, Thanks a bunch, Kris said, Life saver!! Thanks Ben for working out the issue. Arjen in Perth said, great hero thank you so much.

Ruth said, Thank you for posting this! So I downloaded the driver UP9 Driver.

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Excellent sleuthing and a very interesting discovery about Belkin. You sir are a gentleman and a scholar! I suggested that they put that on their website. The computer doesnt even recognize that its plugged in. However, it is not working in Windows 7 environment in my new PC. Eventually I thought hmm, lets just see if we can find another USB converter that used a Philips chip. Any help on this folks ….

Great job figuring this out. You windpws my sanity, not to mention a few bucks.

Spent quite a few hours searching on windiws net for a solution before I found your article. But theres a hitch, it killed communication with my printer.

It is compatible with Vista 32 bit computers. Ariel Claudia said, thank you so muchi got all the data readings from a race car!!! Dell said, Thank you so much for sharing your hard work and research! Belkin, You need to stop ripping people off windos contribute to the community.


Now I was at a customer site needing to communicate with a piece of equipment using serial connection. This download did the trick!

F5U109/F5U409 USB PDA Adapter – Drivers

First I had to deal with Windows7 not having hyperterm installed, wijdows I figured how to add hyperterm I ran into the Belkin dongle not being supported until you saved me. Ariel said, Thanks, Ben!!! I will not buy Belkin again. Thank you for your interest in this question. In most cases, it would simply be a recompilation of the existing driver.