|My HP Laptop Wireless quit working|
Did you have an electrical storm or anything that caused the laptop to shut down abruptly? It may have damaged the internal wireless.
Instead of using a USB network card as suggested in response #1, you could try a PCMIA network card (around $12 new) as it doesn't tie up your usb ports. Most people never use the PCMIA slot plus it is a more solid connection than USB.
Some HELP in posting on Computing.net plus free progs and instructions Cheers