Hello Tony,
The USB 3.0 is supported by Windows 7 with the latest updates and service package installed. However, you will also need to consider to check your machine, if its hardware and BIOS is compatible with the USB 3.0.
In the BIOS, there should be an option that will let your machine work with USB 3.0s. Thus, will also allow the installation of the USB 3.0 controller driver, which you may obtain from the manufacturer's support/drive-download site.
Here is an informative thread, with the very same concern: USB 3.0 on Windows 7.
Keep us posted.
All the best.