Temporarily Pause Non-Required Processes and Services before Gaming | Download Under Releases
This project, Freeze to Stock, takes Sycnex's Windows 10 Debloater script, including others soon, and uses it as baseline for what a debloated system SHOULD look like. You can see it in action here from JayzTwoCents. Freeze to Stock then temporarily turns your PC into this debloated example for significantly decreased background CPU usage while gaming.
More Details: How do I use it | How It Works | What's the Catch | Will this brick my PC | Will this affect Program <X>
So far results have been promising on my 4 year old Windows 10 install (Yes, that is about 40+ chrome tabs open and suspended):