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MTA:SA fix

CL29: client integrity warning at launch

Read the complete warning first: CL29 is not the same as the newer “terminated due to an integrity violation” message. Then install the current MTA.

The message

MTA:SA client integrity violation. Possible virus activity

Codes on this page: CL29

Steps

  1. Install the current MTA release

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

    Source: MTA forum, MTA download

  2. Start the copy you just updated

    Start MTA from the installation you just updated. If Windows has several MTA shortcuts, check where your shortcut points, so you do not open an older copy again.

    Source: MTA forum, MTA download

  3. Ask MTA support if CL29 comes back

    If CL29 comes back, stop reinstalling. Go to MTA Client support and give them the complete warning and the MTA build you have installed. No single fix is known to work for all current CL29 reports.

    Careful: “Possible virus activity” is only the wording of the warning. It does not confirm that your computer is infected.

    Source: MTA forum, MTA forum

Worth knowing

The moderator’s reply is an old one. It is a reason to try an update, not proof that a CL29 you get now has the same cause.

Do not edit the registry to fix CL29. Advice from a 2016 CL33 malware case is not a fix for CL29 either.

Still not fixed? Copy the whole message, not only the code, and check your log in the Fix tool. It is read on your own computer.

Other problems like this

Where this comes from

MTA moderator guidance, 1 January 2024

Read on 7 September 2026 and written in our own words here.