In windows at the lower right their is a two monitor icon if it has other things other than a globe (earth) then it needs to resolve that before you can connect to the internet. Try right clicking on it then click on Diagnose and Repair it will give you dialogs which you can choose to resolve the issues.
Disabling both the firewall, and stuck my computer in the DMZ was one of the first things I've done.
Disabling the firewall
Port forwarded it all the ports that the various games used
factory resetting the router
Checking my TCP/IP settings
Refreshing my IP
Updating both my motherboard and Ethernet chipset's drivers
running several virus scans.
Disabling wireless access point (Don't know what this could of done, but it was worth a shot)
fiddling around with my Router's settings.
I wouldn't of come here if I hadn't tried everything I could think of. I'm pretty desperate because I need my FPS fix and none of them work. Think about it, all those noobs left unchecked...