XP Pro_SP3 MS IntelliType Pro 6.2 Keyboard is corded, not wireless. Tried this keyboard on another computer with IntelliType software. No problem. Reduced Device Manager window in size so it could stay open in the upper corner of my monitor. Created a script that would popup a dialog box when the keyboard vanished from Device Manager. Unplugging the keyboard from the USB port and plugging it back in always restores the keyboard in Device Manager. With earlier versions of Windows I've resolved many driver and/or hardware problems with a Registry hack. I've looked at the Keys and Values. Not sure if it would help. Maybe I'm a fool, because I plan to replace this keyboard. It's too big and clumsy for my hands. I'm concerned that this problem may not go away with a new keyboard. I'd like to understand why this driver is dropping out before I buy another keyboard.