Laptop won't connect wirelessly but other devices do?

I recently changed ISPs. When the guy left I was on the internet wirelessly on the laptop but the next day the only way I could get online on the laptop was through an Ethernet cable connected to the router. I have a Linksys WRT54G… But I don't think it is the router. Our iPhones, Nintendo Wii and wireless printer can connect wirelessly but my laptop won't. Any suggestions?

Try install the Wi-Fi drivers of your laptop. And if it is already installed then uninstall it and reinstall.install the lasted Wi-Fi drivers for your laptop.

Check and see if your wireless Wi-Fi switch on your computer is turned on. It looks like a small Vertical line with 3 or 4 1/4 moons on ether side of it.

Try this it will works
enjoy

http://expertsdublog.blogspot.com/2013/07/wifi-configuration-with-windows-os.html