Posted 12 July 2011 - 06:11 PM
Have you restarted your computer?
Usually i find when things muck up, it's best to try to restart first before you start troubleshooting, as that might solve your issues.
Also, is there a button on your laptop that toggles wifi on and off? If so, check to make sure its on. (checking the simple stuff first)
Click Start. Right click on Computer and choose Manage. Choose Device Manager on the left pane. Do any items appear with an yellow exclamation mark on them?
Try resetting your router. Today at work two laptops wouldn't connect to our network, and other computers would connect fine. Restarting the router seemed to solve the problem.