1. :\Program Files (x86)\Common Files\BattlEye
2: :\SteamLibrary\steamapps\common\Mount & Blade II Bannerlord\bin\Win64_Shipping_Client\BattlEye
3. Run Command Prompt (run as administrator)
4. sc delete BEService <---------- WRITE THAT IN THE COMMAND PROMPT, it should say that the process was successful or something along those lines
5. Preferably restart your computer. Then open Steam and Verify file integrity. Steam will say you have 6 files missing and then redownload them. That is when you will have a clean start.