Downloading usb to serial ch340 prolific driver for window 7,8,8.1,10 vista. Download Prolific USB to Serial Driver for Windows 10 7 8 8.1 Vista XP 64/32 Bit Dev Tech Help.

For many of these, Win-7 will recognize it automatically and load drivers with no further to-do. Some off-brand stuff may come with its own driver CD to load. You should know that there is a lot of junk/knock-off/counterfeit USB-serial stuff out there that doesn't work very well. Even if you get a driver to work, they frequently have comms problems.

Personally, I'd return it and get something better. Air-link, IOgear, SIIG makes good stuff. Other brands may be OK as well if they use the FTDI / prolific chipsets but its hard to know. There are some long threads here discussing the problem. Smart adobe cc blocker mac.

After messing around with a few bummers, I finally went with a PCI-E 4X serial board from SIIG. Works perfectly all the time with Win7-64 Pro.