you should have posted this in the motherboard section and include the model of the board. then try going to the manufacturer site and see if the board supports usb2. if this is an oem machine, you need to check the manufacturer specs. now please mr moderator, shut this fucker down.
Best way to check is to insert a usb 2 device into your usb port, and if popup comes and says device can work faster if ur port was usb 2 means no it does not have usb 2 features.