XP won't boot without original mouse and keyboard

[JIMC]

I just bought a Microsoft 700 wireless mouse and keyboard. My XP/Home system hangs on boot unless the original mouse and keyboard are plugged into the machine. What can I do so that I don't need the old hardware plugged in? Thanks to one and all Jimc

[Ponch]

Enable "legacy USB" in Bios and check the "halt on error" section if applicable.

Does it stop in XP or before Windows even starts.