You buy a wireless router, wire the desktop and router to the modem, and use the laptop by getting a wireless card or usb wireless adapter. As long as the laptop has the appropriate connector (USB, PS/2, serial, etc...) you can use a mouse from a standard desktop computer without issue. If you want to share files, then here's a way. But how do you mean "connect"? If the laptop has a floppy drive and poradniki a network card you can make a network bootdisk to boot the laptop and connect to...