vcom.sys is a VDD for a COM port. Guesses follow: The laptop has no COM port, only USB. com.sys is not installed, vcom.sys has not found com.sys. Right?

vcom.sys is needed only if you are using a mouse attached to a COM port. You don't need it otherwise (USB mouse, built-in trackpads and so on). If you have no COM port on the laptop then delete the vcom.sys line from your config.sys .