Corrupted files can lead to memory allocation failures. Open your Steam Library .
Windows 10's Game Bar and DVR can cause issues with some games. Disable them: Corrupted files can lead to memory allocation failures
: Third-party overlays like RivaTuner or MSI Afterburner can interfere with game memory. Try closing these before launching. Are you experiencing this error in Campaign, Zombies, or Multiplayer specifically? or Multiplayer specifically?