I tested this yesterday and it was working for me, are you using the right trainer?
Delete trainer and all files in
C:\Users\USERNAMEHERE\AppData\Local\Temp
C:\Users\USERNAMEHERE\Cheathappens\Work
C:\Users\USERNAMEHERE\AppData\Roaming\Cheat Happens\0x90
C:\ProgramData\CheatHappens
Learn how to make your own Trainer Cleaner for the above paths Here. Link
Reboot PC to clear excess memory, get a fresh copy of latest trainer and extract it. Run trainer as admin, read the instructions and try again. At times, a new game may be needed to resolve failed options if the data in your save file was altered. Use on a new game and test the option. If it now works, quit to main menu and load your save and try it again. May also need to run the game without the trainer first and play a bit so the save file gets updated to use possible new values.
I will give this a try but this is about the 3rd or 4th time i've tried to run the Halo: The Master Chief Collection Trainer (Halo Reach 09.23.2020) trainer so far as I can see it's the most up to date trainer on Cheat Happens for Halo Reach
I am so damn stupid and you have my sincerest apologies yet again. I am getting myself so damn confused with all of these files lol. I misread this and thought it was referring to the halo reach trainer I tested. However I will retest the Halo CE Anniversary trainer again and reply back.
Thanks for your help with all of this and sorry if I seem to be blowing up the post boards lol. I am new and learning and am curious as to why some of these still work and other's don't.
I followed your instructions and retested the latest Halo CE Anniversary Trainer and all of the options including the aforementioned speed hack worked. Thank you so very much for your help and your patience as I try to test these trainers to see which may need to be fixed. I know for sure the Halo Reach trainer is broken it's very outdated compared to the others and almost every option failed on me.