Hi There... I've been having this problem for some time now - whenever I reboot my machine, the scroll wheel stops working. I have to go into my mouse settings, alter something to do with the scroll wheel, and save it again, and then everything is OK. At first I thought it was mouse specific, but I've now the following mice; Logitech Cordless Optical mouse Logitech bog standard PS2 mouse Chieftec Cordless mouse It's not just limited by my system either - I've got two PCs, and I see the problem on both of them. Just in case it helps anyone, my keyboard (Logitech cordless one) has a scoll button which works flawlessly upon each reboot. Does anyone know what the problem can be? I put it down to my Logitech mouse, but after speaking to support, and then discovering the problem with the Chieftec mouse too, I wouldn't know where to start! Anyone have any ideas? Bablos.