Ok, yesterday morning when I woke up, I noticed that I had a problem. My PC keeps rebbooting. Everytime it gets to the Windows XP logo, with the scrolling bar at the bottom, it reboots. Any idea of what that may be? It seems that my usb accessories (like my keyboard) don't function. The 7-port hub has power light, but the keyboard doesn't work. Hmm.. It did come with an transformer, but I am not using it right now. I may try a couple of things to troubleshoot this, but if anyone has any ideas let me know.