Erreur fatale : impossible de charger les modules de la plateforme

Solved
Hello,
I have a big problem with Steam. On the first launch I got the following error message:
Failed to load platform modules
I launch Counter-Strike 1.6, it runs fine; I test Counter-Strike: Source and then a window opens with Counter-Strike: Source loading, the window closes immediately and then the PC returns to the Desktop
There I go crazy because I formatted the machine, reinstalled Windows XP, reinstalled Steam, reinstalled Counter-Strike and all the HL² mods, updated all my PC drivers, DirectX 9.0c etc ...
In short I’m going nuts.
I have to play old wars on CS 1.6 and it’s been over a month since I last played Source.

My config:

Mozilla Firefox
Windows XP Home SP3
RAM: 1536 MB
IDE Seagate HDD: 160 GB
DirectX 9.0c
Graphics card: Sapphire HD 2600 XT 256 MB GDDR3 AGP x8
Processor: AMD Sempron 2800 XP

Thanks in advance for your valuable help.

37 answers

  1. Hi!
    I had the same problem:
    Steam update => unable to open.
    I deleted the files mss32_s.dll and steam.dll in program files/steam.
    I restarted Steam and it ran the full update again.
    Since then everything is fine.

    Maybe a bug during the update...
    1. Thank you man, it works perfectly. And people, instead of formatting your PC, read the forums a bit; there are very simple answers without overthinking. Thanks, flootchel, just in case
    2. Nice for me too!
    3. thank you man, it’s perfect
    4. Thank you! Your solution fixed the problem! In English-language sites, they propose another solution that doesn’t work.
    5. Nickel, your solution, simple, effective and it works