I have a Windows XP desktop that gives a low battery warning and shuts off occasionally. In the Power Options, even though the power scheme is set on Home/Desktop, it shows options for plugged in and battery. The power scheme is NOT on portable. I do have a UPS, but even with the USB cable disconnected, it still shows the same options. I tried going to Manage and Device Manager and looking for Batteries and disabling it, but there is no Battery category there. How do I make my desktop think it's a desktop and not a laptop again?