Possible SOLUTION to: Steam servers are too busy to handle your request... error code 53 (and probably others too)
I was having problems running 2 games from Steam, L4D2 and Portal 2 and managed to resolve my issues with a few steps.
As I started the game Steam showed me a message "Completing installation...", counted to 100% then showed me the following error:
The steam servers are too busy to handle your request for Portal 2. (Error code 53)
Due to security, I am always logged on with a limited rights account. Therefore, I cannot install games / programs without having to provide other credentials. Also, my standard account cannot shut down or modify settings for antivirus or the firewall.
If you are already logged on with an administrator account, skip the first step...
1. Log on with a administrator account (I did it with a local admin, not with a domain admin) 2. Disable antivirus AND firewall 3. Start Steam 4. Start the game (I had to start each game several times until they started) 5. Exit the game 6. Shutdown steam 7. Re-enable antivirus and firewall 8. Start Steam again 9. Start the games again to verify that they are still running 10. Logoff and logon to your normal account
The games started for me after that on my normal, limited access, login.
For sake of completeness, my setup:
Windows 7 Client McAfee Total Protection 12.1 (Firewall and Antivirus) CPU: Intel core i7 950 (Quad core 3Ghz) RAM: 12GB (Physical RAM – Paging disabled - about 3.3 GB used with only a few programs running) HDD: >500GB free space remaining
My PC is part of a domain and I am always using a standard user account that has insufficient rights to install or modify software. Whenever I install a new game (even with Steam) I need to provide the credentials of another login that has sufficient rights to install and modify software.