quite often not, but how old is your system ie are you on XP ? if so you have USB 2 by default. Just make sure that if you use a hub that it is usb 2 not 1. You can use a USB 1 hub bub then your USB 2 slows down to USB 1. basic hubs are not expensive (around £4 powered hubs come in at £8 or so . I use one which can be got through net from click here
XP doesn't have USB2 by default, it wont turn a USB1.1 port into a USB2 port, XP has USB2 support by default. If your computer doesn't have USB2 ports then you will need to buy a PCI-USB2 card and install that card in a spare PCI slot.
MAJ is so much more eloquent than I and so explained it better. A hub bub is what you get with a cordless keyboard that can't or won't keep up with my typing. I suspect it's "won't" as all things mechanical are out to get me this week including the car
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