Steam won't connect

[Crasher]

This is the message I receive.

Unable to connect to server. Server may be offline or you may not connected to the internet.-105

Unable to connect to server. Server may be offline or you may not connected to the internet.

The things that I don't understand is that I can chat with my friends on steam, see my fav servers and how much people there is on, update my games and my ati drivers but I can't launch any games. One day everythings worked fine and the other one I get this. Firewall is ok and doesn't seem to block anything. If it could help I us G-Data as antivirus since June and I never had any connection problem.

 

[Snipeye]

Could just be too many people connecting at once. Has problem resolved itself so we can close this thread?

 

[lt.thomas]

I Just delete my clientregisty.blob and it usually works after that