1) make sure your drivers are up to date
2) make sure if you have 2 audio devices disable one. One can conflict with the other real fast.
3) check your background processes and services, if you don’t require some to run disable those.
4) disable Windows update, do it manually
5) Ccleaner its free unless you want yhe pro has a great section that analyzes resource sucking processes and tells you which ones you can put to sleep. It will also update drivers.
6) flush your dns server, reboot router.
Gaming requires tweaks, even on monster machines. If you want you can create a windows profile for gaming if you don’t want the device tweaked for games only.
Other than the basics, maybe Fugative will chime in with ideas. Without further i fo, it sounds like an audio conflict, for at least part of your issues.
We all know HT hasn’t made changes on his end.