MTA:SA anti-cheat code
MTA:SA anti-cheat code SD#26
Something is blocking a part of MTA's anti-cheat.
How to fix it
Allow MTA in your security software
Add the MTA folder as an exception, then start MTA again.
Repair your MTA installation
Run the current installer from multitheftauto.com over your existing installation. It replaces MTA's own files without touching your settings.
Read the whole message, then the official page
The number names a detection category, not a program on your computer. MTA's anti-cheat guide lists what each category covers, and the full message is what tells you which case you are in.
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.
About this code
SD codes are special detections a server can switch on. Most of them are about the environment MTA is running in: a virtual machine, a blocked component, or a program that can change how the game runs. MTA's own documentation gives SD#26 as Blocked anti-cheat component.
All fix guides · Every MTA:SA error code · Crash codes and offsets
Where this comes from
Read on 5 September 2026 and written in our own words here.