How To Confirm Whether I have USB 2.0 Installed In My Machine

All the following methods will confirm whether you have USB 2.0 installed in your machine or not.
First method:-

Start>Run>type Devmgmt.Msc>ok
In the Device Manager expand the Universal Serial Bus section. There should be an "Enhanced" USB host controller present.

Second method:-

Start>Run>Regedit>ok
Now navigate to the following key:-
HKLM\SYSTEM\CurrentControlSet\Enum\USB\ROOT_HUB20
The presence of the above registry key seems to indicate USB 2.0

Third method:-

Run this direct edit:- Test for USB 2 (Line 330, right column)http://www.kellys-korner-xp.com/xp_tweaks.htm