that's the story of w7 i think. did you check the resource meter? the last time i checked all core are unparked by default.

is it neccessary to manually adjust this core parking thingie? I think the cpu and windows especially 10, is smart enough to park and unpark cores accordingly.

As for games, multi-processor does not really help unless they are designed to make use of them. For games, the processor speed is more important. Then again, if some games support multi-core then it would be able to handle core parking, right?

I disable the cpu park using Process Lasso (Windows 7), will try on my Windows 10 desktop tonight.

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Seem like my slow laptop responsive improved after unpark all the cores.

it doesn't make sense. When CPU power are needed, the software will request for it and CPU will be given. No need to manually manage. If you are using laptop, I would advise to look at your power settings. By default when running on battery, the CPU will be capped at lower speed. That might be the reason why performance is lower.

Open your power options. Edit whichever plan you are using. Look for Advanced Power Settings. Then Processor Power Management.