How do I know if I have USB2 Ports on my Windows PC ?
1) Visit the control panel, and open System Properties.
2) Then open the device manager and expand the section "Universal Serial Bus Controllers"
3) If you see the word "enhanced" Host Controller listed, then you have USB2 Hardware and software drivers working on your PC.
It is possible that some of the ports on your PC are USB1 and others USB2, but as they look physically the same you cannot tell which are which.