Ok so New gateway laptop I run L4D It works fine. Then one day it just decides not to connect. I join the lobby all is well and when the game goes to load I get connection failed ten times. So it turns out I can't connect to any server only local play. I stayed up till 3:00 in the morning and I still can't solve the issue. However, now I have another. I uninstalled steam and reinstalled it and get the Missing Steam.dll error. So I downloaded it separately and copied and pasted it in the steam folder, launch steam and now get SteamUI.dll missing so I do the same and I still get SteamUI.dll missing. I am extremely pissed and tired and if anyone has any ideas please post so I can look at them in the morning when I have rest... EDIT: What I have done. Lots of googeling... Disabled All Fire Walls Uninstalled Norton Cleaned Registry Disabled Router Firewall and allowed all ports just in case A few cmd commands I think I might just do a Reformat tomorrow if you guys don't come up with anything.