Every USB stick brings up hardware wizard..

Hi

I have a problem here at work where we have some laptops that bring up the "add new hardware" wizard for every USB memory stick that gets plugged in.
Now the normal users don't have the rights to run the hardware wizard (we are a College with 16-18 year olds) but even if I install a few as admin, the rest of the kids still get the same problem...

In a lot of cases they are even the same make/model of stick.

Now on a "normal" PC, even with restricted users, their memory sticks just work..

Any ideas?

(We have about 40 laptops and 500 users with sticks so I can't just sit as admin and install every users stick on every laptop!)

Thanks..