I HAVE THE FIX
steam guide for more detail:
Basically the anti cheat software on certain Computers shall damage the performance of the PC on halo using way too many cores so what i done was some 24 hours of research to fix this problem and share as i had same too.
template target command :
C:WindowsSystem32cmd.exe /C start “” /affinity 1 “C:Program Files (x86)SteamsteamappscommonHalo The Master Chief Collectionmcclauncher.exe”
C:WindowsSystem32cmd.exe /C start “” /affinity 1 “(PathToFolder)mcclauncher.exe”
This worked for me once so i DO NOT guarantee sucess but i know it something to do with the Anti Cheat using too many cores
Update: This works more than once . i noticed that the game does not launch on steam when the anti cheat launches as after the launch load of anti cheat the game then starts on steam and restarts the antivirus launch which completely throws away the purpose BUT .
If you launch the game on steam first and wait for first load of the anti cheat and then load the short cut you may recreate as i got it to work again