Mouse eating CPU

Hello, i have this problem since i bought this computer ( 2 days ago ).

My computer using vista home premium its CPu is going towords 60% when i
move my mouse. This only happens 20 or 25 mins after booting up.

I have a G5 gaming mouse and its the same problem if i use vista compatible
drivers or just default plug&play drivers.

this is very anoying as i have to reboot every half an hour to use its full
potentian.

Also it makes gaming impossible because my fps are dropping and lagging very
much when moving the mouse...

The g5 mouse defaulth hz is 500... the same problems can be found when
using 125, 333, 500, 1000 hz. Although with 125hz its not going towards 60%
cpu but only 20% .. but it is still a problem...

The mouse works perfect on my winxp computer... And I also tried another
mouse ( razer ) with 500hz standard .. and its the same problem ...

So i think Vista can't handle 500hz on usb yet.

My systemspecs :

AMD 64 x2 5000+
nvidea 8600GT ( with latest drivers, vista compat )
1024 ddr2 667mhz
500gb hdd.

I'm searching on google for 2 days now without any solutions.
--
<<thnx>>