What does Task Manager show when Omen CC shows -1%? If something else above 0% (as it should), then Omen CC is getting really high with incorrect use of variable types. That you can’t fix since it requires debugging the source code. Now, to be fair, I’d delete that command center (if it doesn’t allow you to do truly specific things like RGB layout editing) as well as everything else that comes with your laptop. And as a bonus, destroyed all that trash that Microsoft packs into Win 10 (like telemetry, Superfetch, Prefetch and other stuff).
If you’d like to “purify” your OS, then I’d suggest you use DWS, Win 10 Tweaker and O&OShutUp10. Also there’s RegCleaner 4.3 by Jouni Vuorio (it was free, but his site is down, so google to the rescue), that might look like from ‘98, but it works like a beast and compatible with Windows 10. And also I have a reg file that disables Cortana for good w/o losing ability to use Search Bar near Start Menu (download link: https://drive.google.com/drive/folders/1...). Blockmailru.xml is only for russian users, for you it’s not obligatory to use it.