Battlefield 6 Wont Launch — EAAntiCheatService and 0xC0000005 Error

You mentioned that Task Manager does not show bf6.exe running, and I understand that on your Windows 11 system you’re also seeing a 0xC0000005 access violation error. These two facts together strongly suggest that the issue may not be caused directly by the Battlefield 6 game software itself — but rather something at the system or Windows level. 

Here are some helpful references that explain common causes and troubleshooting methods for the 0xC0000005 error on Windows 11:

Windows 11 Error Code 0xC0000005 – overview and general fixes. 
https://www.minitool.com/news/windows-11-error-code-0xc0000005.html

Fix 0xC0000005 in Windows Installation – step-by-step solutions. 
https://www.wintips.org/fix-0xc0000005-in-windows-installation/

How to Fix Windows 11 Error 0xC0000005 – practical repair methods.
https://www.easeus.com/partition-manager-software/how-to-fix-windows-11-error-0xc0000005.html

These guides cover the common causes of error code 0xC0000005, which include system file corruption, driver conflicts, memory issues, DEP settings, and registry problems, among others — many of which are not specific to any particular game.

In fact, community reports regarding Battlefield 6 (BF6) suggest that when this error happens in the game it’s typically logged as an “access violation,” meaning the game tried to read or write memory that wasn’t valid (e.g., a null pointer) and then exited abruptly. In these cases, bf6.exe doesn’t stay running long enough to appear normally in Task Manager.