Use the one I got from Startech, they resell this unit. I have used it on Win7 and it works perfectly. RapidShare: 1-CLICK Web hosting - Easy Filehosting
When you try to install it manually and tell windows to search online for driver, it doesn't find it? For me it installed that way. Anyway, I zipped the driver ,you didn't say for what you are using it, so I don't know if it will work for you, but ,you can try to install manually it from this folder, just unzip
This driver doesn't work for you?
Welcome to Prolific
I installed it Win 7 x64 and in Virtual PC XP Mode without any problem.


May be you don't have administrator privileges. Try to execute setup with "RUN AS".

Ya'll who don't have your full system specs filled out even 32 or 64 bit Seven you really need to do this it will help now and in the future.
You can do it hereView attachment 128294
If you need help, this program should help you out. Speccy - Download
Thanks. Fabe
Is this the drive you have tried for Windows Seven 64 bit?
View attachment 128298
Drivers for USB to Serial Adapters Prolific Chip 64-bit 2009 at SerialGear.com
Fabe