Solved Only Firefox can connect to the internet! Quick read - Page 2 - Windows 7 Forums
Someone gave me the solution on a different forum. If you have the same problem I was having, try this.
Ever since I installed Windows 7 Home Premium, firefox works, but no other apps can connect to the internet i.e. online games, itunes, anti-virus, Visual Studio, etc. I've disabled the firewall and anti-virus, but it doesn't help. I'm using a Belkin Wireless N Router and TP-Link TL-WN851N...
adapter
application
belkin
connectivity
firefox
firewall
games
home premium
internet
itunes
network
router
security
starter
tp-link
troubleshooting
visual studio
wep encryption
windows 7
wireless