I have a Microsoft Wireless Entertainment Keyboard 8000, and when the charger/usb-hub is connected, the computer won't start. All I get is the bios boot screen, and it won't go further. But if I disconnect either the usb-cable or the power-cable to the charger the computer boots normally.
Any suggestions as to what's causing this behaviour? I've tried the charger on two different computers with the same result.