Indeed, a wireless adapter for your USB. Buy it in your favorite computer shop. Be sure it comes with the drivers for your elderly OS (XP probably).
I have an elderly Toshiba laptop that I have always used on Dial-up pay as you go internet connection. It is very slow to load the Windows updates and I wonder if I can use my broaband wireless router that feeds my other main PC.
What adaption would I need to enable wireless connectivity for the laptop, is it just something that plugs into a USB port? Thanks in anticipation.