Good Day Lazzy3,
I appreciate your time getting back to this thread, it appears that the anti-malware service and third-party apps are taking most of the usage.
You can visit this link and try these steps.
https://answers.microsoft.com/en-us/windows/for...
Once done, go to this link and scan your computer to check if there are malwares or rootkits running in your system.
Here's the link to download.
https://downloads.malwarebytes.com/file/10789
Once downloaded and installed, open the app and perform a scan , check for malware infection.
Once the scan is done restart your computer using cleanboot.
https://answers.microsoft.com/en-us/insider/for...
After restart observe the performance.
Have a wonderful day ahead and stay safe.
Sincerely,
Carlo T.
Standard Disclaimer: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.