I wanted to share a video I made about how to update your PC to enabled TPM 2.0 and Secure Boot. A lot of people have been having problems with this because they're still getting issues in COD HQ saying that their PC doesn't have TPM enabled when it actually is.
The issue is that you probably have an old BIOS firmware version that needs an update. Funnily enough, this is a bug with your motherboard, not with COD!
The video will show you how to enable TPM 2.0 and Secure Boot on your PC but I've also written a comment and pinned it to the top which walks you through how to update your BIOS to make sure that the TPM checks COD HQ does actually work.
Sorry if this comes across as spam, I'm just trying to help. I've just updated my system and it's not difficult, but it sure is stressful. Hopefully this helps people out!