I receive the error "Fatal Error: Failed to load platform modules" - what should I do?
The cause of this error may vary, depending upon when the error is encountered. Please follow the instructions which correspond to the situation.
The error is being caused by a crashed Steam process interfering with the Steam update process.
Exit Steam and delete everything under the Steam installation directory except Steam.exe and the \SteamApps folder - then start Steam using the Steam.exe application in this folder (not a previous shortcut) - this will force Steam to update when you log in.
Edit only the Windows registry key specified - editing some Windows registry keys may damage your computer's operating system or cause unpredictable behavior.