Old forum guides will tell you to use TeknoMW3. Do not do this. TeknoMW3 was designed for 1.4.382 to enable LAN emulation, but it is dead, insecure, and riddled with exploits. Stick to Plutonium.
The Warzone updates focused heavily on solos gameplay and vehicle interaction. call of duty modern warfare 3 14382 patch
Verdict: The 14382 patch is widely regarded by the PC community as the "patch that killed MW3." It prioritized Steam’s new networking API over gameplay functionality, breaking more than it fixed. Old forum guides will tell you to use TeknoMW3