To be technical here’s a list of troubleshooting steps that I think will normally resolve something like this. If I missed something please let me know nicely. Please don’t forget respect.

    1. Update Graphics Drivers
    2. Roll back the last update
    3. Disable Windows 10 Game Bar
    4. Disable Windows 10 Gaming
    5. Windows Settings > System > Notifications & Actions > untick Get tips, tricks and suggestions as you use Windows
    6. Perform a clean boot 

    Now most like myself have done all of the above AND still getting low FPS in games.
    I always think of others so once I find something I will report back to what it is and whether or not it will help others that are experiencing this same issue.