Recently, whenever I plug in my laptop, the CPU slows down severely. Also, it isn't charging, as it says "plugged in, not charging". The CPU drops from 2200 Mhz, to 500 Mhz. I've changed the advanced power plan settings. My laptop is a Dell Inspiron 15 7000 Series
Edit - I'm on Windows 10 and don't use any software for power management, and other chargers don't help either. I have been using the original Dell charger