Voila après avoir suprimer mon clientregistry.blob je sais plus quoi faire SVP traduisez moi SVP SVP SVP SVP!!!
Firewalls
The last situation you might run into is where you used " logout and exit" and then have an internet connection problem ( most typically caused by your firewall). This also happens when you delete the Clientregistry.blob file which stores your password.
In this case, when you try to run Steam, it will come up and tell you that you can´t log into Steam until you connect to the internet. Because your firewall is selectively blocking only Steam ( usually due to an update) you can still browse the web so it looks like you don´t have an internet problem, and indeed, you don´t. What you have is a firewall problem.
The solution there is to open your Firewall User Interface and remove all references to Steam.exe and HL.exe, then run Steam again. This time, your Firewall will ask you if you want to allow Steam to have access to the internet and so you say yes, and now Steam will connect to the Steam Network and ask you to log in.
In the unfortunate case where the player installed a firewall, then manually deleted the firewall directory and executables ( he didn´t use the add/remove uninstall tool) he might very well still have parts of the firewall running in memory where he can´t see them, but they are still there trying to protect him from problems.
In this case, Steam and HL will work until the game executables get updated, and then the Firewall will see that the signatures have changed and will start blocking Steam and HL from accessing the internet.
This is the most common cause of Steam getting stuck updating and then give the message " Failed to connect to the Steam Network"
Unfortunately, there is no user interface left for the player to control the firewall, and in fact doesn´t even think he has a firewall installed so he´s stuck.
Usually the only way to fix this is to go re-install the same firewall or an update of that firewall and then uninstall it properly using the add/remove tool in the control panel.
If you are unable to remove the blockage and you are unable to repair your installation then often the only last option is to re-install your operating system.