Error 51 with Steam and F-Secure trying to play games

Theres many games on Steam that we cant play with F-Secure on our systems:


And the worst thing is that none of those "fixes" work. You only need to have F-Secure on your system to not be able to play many games.Man Sad


  • tripodzid
    tripodzid Posts: 42

    I also got a few problems with my game where it lead me to simply disable it for a while so I could play my games. A bit risky, but it's worth doing so. image

  • Gary
    Gary Posts: 70 Former F-Secure Employee

    Hi patet,

    If you encounter problems with legitimate programs being blocked by DeepGuard, you can try to clear Use advanced process monitoring. For maximal protection, DeepGuard temporarily modifies running programs. Because of this advanced process monitoring, some programs may fail. This happens to programs that check their own integrity.

    Turn off advanced process monitoring

    1. Open the F-Secure user interface and click Settings .
    2. Select Computer and then Deepguard .
    3. Clear the Advanced Process Monitoring check box.
    4. Click OK and then Close .

    For more information kindly visit our page here.

  • patet
    patet Posts: 57

    The thing is, nothing works with this problem, not disabling deep guard, not removing online safety, not turning computer security off... Tried all those and none worked... Smiley Sad

  • Janiashvili
    Janiashvili Posts: 469
    so, reinstall the game
  • patet
    patet Posts: 57

    Why? It wont help.


    The people at F-Secure and Valve need to fix this ASAP.

  • motec-data
    motec-data Posts: 47

    Have you reinstalled the game and it doesn't help? Or are you assuming it wont help?

  • patet
    patet Posts: 57

    Yes, I have tried and it didnt help

  • Jayson
    Jayson Posts: 595

    Hi patet,

    With regards to your enquiry, please log a ticket by contacting our support:

    We would need more details on this issue, e.g. the game names and a FSDIAG of the affected system to investigate further.

    To create FSDIAG file:


    Best Regards,

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