game refuses to launch

[brandongaming33]

So I recently started playing halo 2, on the mcc, via game pass for pc. I get 80% of the way through the game, and was planning on finishing it today, and it refuses to launch. I literary played it without issues around 13 hours ago, last night. It shows the first splash screen (the anticheat one), then it doesn't open any further than that, for a long time. It goes into the background, for about 20 minutes, and absolutely rails my hard drive, like 25 MBPS, and it seems "system" also rails it as well, with pretty much the same usage, then the game starts as normal, then it goes to what seems to be an unlimited loading screen... could someone give me some tips?

here's what I've tried already: rebooting the pc, launching it from every place you can, launching it with, and without the anticheat, and there I checked, there hasn't been any updates to the game since 3 days ago, so I doubt it's an issue with an update, drivers are up to date, and every other game I tried ran without an issue, including ones from the microsoft store.

[zeusthemoose]

Validate the game files to make sure everything that is needed is there.

[Jae Tee]

Try to run it in compatibility mode. It actually once worked for me.

[brandongaming33]

14 minutes ago, Jae Tee said:

Try to run it in compatibility mode. It actually once worked for me.

I tried the compatibility mode troubleshooter, and it didn't seem to fix anything

15 minutes ago, zeusthemoose said:

Validate the game files to make sure everything that is needed is there.

I tried running the repair tool, and that didn't fix it, is there any way to validate with an automated checker, or something?

[zeusthemoose]

37 minutes ago, brandongaming33 said:

I tried running the repair tool, and that didn't fix it, is there any way to validate with an automated checker, or something?

What game launcher are you using?

[brandongaming33]

2 hours ago, zeusthemoose said:

What game launcher are you using?

the microsoft one, I usually the xbox (beta) app, or launch them from the start thing

[zeusthemoose]

2 hours ago, brandongaming33 said:

the microsoft one, I usually the xbox (beta) app, or launch them from the start thing

I haven't been able to find a way to validate the files, so you might just have to uninstall and reinstall the game