Looking at Intel specs for that model of CPU has 'Intel Turbo Boost Technology' as 'No' so it may not be possible to get rid of the warning but fine to ignore. https://ark.intel.com/content/www/us/en/ark/products/122590/intel-core-i3-7020u-processor-3m-cache-2-30-ghz.html#tab-blade-1-0-7

Here's a similar issue on their github, https://github.com/AdnanHodzic/auto-cpufreq/issues/446 Sounds like it should still be able to slow down the CPU but it won't be able to change turbo boost due to processor not supporting that feature.