There's a lot of good Steam players on here that are on my friends list, so I'm wondering if any of you are computer savvy enough to figure out what the eff is wrong with my PC?

I cannot log on to Steam anymore. I keep getting the "Cannot connect to Steam servers" for whatever reason. My wireless connection is fine. I had no problems with Steam up until about two or so weeks ago, when suddenly I couldn't access anymore.

I've gone through Steam forum after Steam forum with nary a positive cure. I've deleted the clientregistry.blob, which supposedly resets your member settings, but it didn't work. I'm guessing it's antivirus related, but my AV hasn't changed soooo . . . any help?