Mouse Problem's

Since a few weeks ago i got vista running on my pc i have a big problem with
my mouse. Sometimes my mouse wont move for like 2,5 or 10 seconds. And
sometimes it does totally nothing after a while. And sometimes my mouse goes
crazy it flashes trough my screen and clicks opens all kinds of programms and
stuff wich is pretty anoying. I have tried to fix this problem by replacing
my simple Sweex ps/2 mouse, with a original microsoft intelliMouse 1.3A Ps/2
compactible. But that didn't seem to help a bit. I have tried a few other
mouses but also those didn't change the problem. So then i downloaded the
newest intellimouse software also this wont work. I have no further clue
about what i should do to get this problem fixet. I can not play games or
anything becose of this problem.

My system specs are:
Windows Vista Home premium
Intel core 6300 @ 1.86ghz
1gb ram
Nvidea Geforce 8800 Gts

Btw: Sorry if my englisch is not really good. I'm not from The Netherlands.