Could not make it work on Windows 7. Recognized as: Prolific USB to Serial Comm Port. "This device can not start. (Code 10)." Even with (all) the drivers provided. I have another adapter Chipset Prolific PL 2303 which works very well under Win7 reinstalling the same drivers supplied with this product (with the first installation automatically uninstalled my previous drivers !!! Cheap, but too, saw the operation. Amazon should better select its suppliers.