you are not alone. There are some issues with a minimal percentage of people and it somehow revolves around wpa/wpa2 or other security settings. First try logging into your router and take off all security settings to verify connectivity with no security. If you can connect without security then re-enable security and Try this; Open Network & Sharing Center
Setup a new connection or network
Pick Manually connect to a wireless network, pick on Next
Manually enter "Network name:"
Select "Security type: WEP, WPA, WPA2", pick Next (under here I had WEP, WPA-Personal, WPA2-Personal, WPA-Enterprise, WPA2-Enterprise)
Pick on "Change connection settings"
Pick on the "Security" tab
Select the type at “Choose a network...