Nothing shows up in "join multiplayer game"

When I click the “join multiplayer game” button, it says refreshing for 3-5 minutes and then no games show up. I tried to disable my firewall and my norton anti-virus but that didn’t work. Here are my specs if that can help solve my problem:

RAM- 3 gigs
OS- Windows 7
Processor- AMD Athlon II Dual-core M3000
Graphics Card- AMD M880G with ATI Mobility Radeon HD 4200

Could it be something with the way Windows 7 works?

Any help would be appreciated.

Are you behind a school network/router of some kind? Some schools/networks/routers by default block the steam friend’s port.

Check your Firewall, any virus protection programs maybe blocking, and then keep refreshing all.

Nope there are no virus programs that I haven’t already turned off, and i’m not in any kind of school or public network, though I do have a wireless connection… -_-