Steam not Connecting and Can't Launch Game

I have a problem with Steam. I can play games and stuff from it fine, but on the Store page, it says, "Unable to connect to server. Server may be offline or you may not be connected to the internet.-102." I sent a support ticket, and they replied telling me to delete everything in my Steam folder (except for steam.exe and my steamapps folder) and let Steam re-download all of the files. I did, but it didn't fix the problem. I can't think of anything that I did to cause it to happen, it just happened.

Another issue I'm having is that my Half-Life 2: Episode 2 won't launch. When I click to play it, It comes up with the box saying, "Preparing to lauch..." and then nothing happens. No error box or anything. I've tried reinstalling both the game and Steam and it didn't fix it.

Check your firewall settings.ShadowDeathX

Well, I just tried disabling firewall and that didn't work, so I guess it's not that.

Something similar happened to me, so I uninstalled Steam and reinstalled it and everything works fine now.SoraX64

I guess it wouldn't hurt to reinstall it again.

I reinstalled Steam, but no luck.

Well, I managed to get Episode 2 working by deleting all of the source files from my steamapps folder and reinstalling episode 2. The other problem remains though :(.