I've come across a trick that increases hash rate of CPU mining on Windows 10. I managed to squeeze about 30% extra on average out of my i7. Worked for @JPB18 as well. You might want to give it a try guys.
From the Start menu, open Local Security Policy (under Administrative Tools).
Under Local Policies\User Rights Assignment, double click the Lock Pages in Memory setting.
Click Add User or Group and type your Windows user name.
Restart your computer (logging off and on might work as well)
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