Hardware Reserved Memory Issue

Hi recently i noticed i wasn't using my whole RAM (i have 8 GB of RAM installed in my pc) i tried everything to lower the memory reserved so i can use more of my own RAM but it seems impossible if someone knows how to fix this please help me i can only use 3.5GB of RAM and 4.5 is reserved and useless. (Windows 10)

https://preview.redd.it/s2bensnu30lb1.png?width=1289&format=png&auto=webp&s=69ce818c603af76c32c595e6fce79741e6b03798