I recently got a Sony Vaio VPCEB series laptop and I tried hooking in my external Microsoft Wireless Mobile Mouse 4000 into the computer (it has a small usb flash drive that hooks into the computer). 

I suppose I need some driver? Or perhaps I just need to edit some file? I also thought it might be the USB ports not working, but I tried a different USB device and it worked fine.

Any ideas?
Thanks!