CITMTA & CIT FixCIT Tools

MTA:SA fix

CL29: client integrity warning at launch

Use the complete CL29 warning. It is different from the newer “terminated due to an integrity violation” message.

The message

MTA:SA client integrity violation. Possible virus activity

Codes on this page: CL29

Steps

Try one step, then check whether the problem is still there. Follow any "only if" line before changing a setting.

  1. Replace an old MTA build with the current release

    Close the game and run the current official MTA installer. A moderator recommended updating in the December 2023 CL29 thread; use today’s official download, not the old nightly linked in that reply.

  2. Retry using the official installed launcher

    Launch the installation you just updated. If Windows has several MTA shortcuts, check the shortcut location so you are not reopening an older copy.

  3. Keep the exact warning if it remains

    If CL29 returns, stop repeating reinstalls and use MTA Client support with the complete warning and installed build. There is no verified universal repair for all current CL29 reports.

    Careful: “Possible virus activity” is warning text, not confirmation that your computer is infected.

Worth knowing

The dated reply is evidence for trying an update, not proof that a current failure has the same cause. Do not use registry edits or a 2016 CL33 malware case as a CL29 repair.

Still stuck? The Fix tool reads MTA's own log on your computer and points at the matching steps. Nothing is uploaded.

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Other problems like this

Where this comes from

MTA moderator guidance, 1 January 2024 · applicability limited

Meanings read from these sources on 5 September 2026 and written in our own words here.