ahh. Well also, the windows update did some stuff with security. Maybe my solution was a mix of a few things, in the windows and security app, program seetings, allow battlefield 6 and the anti cheat permissions. If you contact the chatline in EA support, hopeffully they will give you step by step directions for a few possible solutions.
also clear steam download cash and verify files.
may I ask, in your battlefield 6 folder, go to the anti cheat installer, open it up, and tell me if battlefield 6 is in the drop down list. curious iof we even have the same symptoms