Hi Sniper7787
Below is the specs for your processor, it has a base speed of 3.5Ghz and a max. turbo boost speed of 5.3Ghz
https://ark.intel.com/content/www/us/en/ark/pro...
BitDefnder support like most support just read from crib sheets, they have no actual experience, they just provide a reply based on a couple of check lists.
With regards to the Processor problem, I do not think you are going to get your processor to boost up to its max clock speed on battery power and that would be normal, because the battery would not last long if you were running your processor at 5.3Ghz+, while the original speed in your original post was way too low, I think 2.38 Ghz is normal for battery power.