I'm afraid most of this isn't true.
Read https://www.howtogeek.com/240840/should-you-use-the-balanced-power-saver-or-high-performance-power-plan-on-windows/ about what the power options do and how you finetune them.
Every Windows users find a solution for, how to speed up windows 10 computer. Might be several reason for this problem. I will show you how to speed up Windows 10 computer using few tricks.
Power option
How to speed up windows 10 computer using Power option.
Power is the main reason of computer slow down because computer performance depend on the power. So we should control the power option to get best performance in Windows 10 Computer. So go to control panel, Then select power option and as you can see the power option window.
Then you can see 3 options there. You should tick power server option and save it. If you select power sever mode, your computer useless service, applications, shareable things will be stopped. Then processor and RAM will be full performance on to your main services. So will speed up Windows 10 PC better than before.
Tell me what you know

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