Hiya,
yes - usb mouse. Some gaming mice do the work for you....i suppose it could be considered overclocking the usbport.sys file.
Windows stock comes with it set at 125hz and an 8ms response rate - which is fine for general OS use, but when it comes to games (specifically FPS gaming), a noticable difference can be seen between 8ms and 1ms.
From what I understand people have used a Hex editor to make the changes to the file in the past, but from what I read on forums no one has managed to do this for W7 so far..
FYI: the file in question is in
C:/Windows/System32/Drivers
thanks.