Im using SP2, and I doubt there is a problem with it. This notebook is just around 2 months old.. When I go to the device manager everything is there, except it mentions Unknown device.
When the problem first occured, I got this msg; "One of the USB devices attached to this computer has melfunctioned, and Window does not recognize it."
I found this;
http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B318773
article and thinking it may be the issue, although I have doubts because at that time only my mouse was plugged in, and that only has a usb connector.