Your motherboard supports USB 1.1. In order to use USB 2.0, the device you are using (i.e. Digital Camera, Harddrive, ect), you must get a USB 2.0 add-in PCI card. That will allow you to use USB 2.0. However, USB 1.1 devices that you have now cannot use the extra bandwith available to them when you have a USB 2.0 card.
You're confusing hardware with software. USB 1.1 is built in to your computer...1.1 and 2.0 are versions of hardware. USB 2.0 is a specification that is fairly new and most newer motherboards (ones that have been made since may or so) should be USB 2.0 compatable. You can't simply download an update for 1.1 to 2.0.
I'm gonna say you have version 1.1.
If you don't have a USB 2.0 device, I wouldn't worry about it right now. Did you get a manual with your laptop? If so, it should tell you. And go to system properties and Hardware configuration. I doubt it will tell you anything.
If you already have a USB 2 device lying around, you could plug it in and if the port is USB 1.1 Windows will tell you that a high speed USB device is pluged into a low speed USB port, if it doesn't do that you have USB 2 ports.