Update eac.md

content/docs/vrchat/eac.md

@@ -5,7 +5,18 @@ title: Easy Anti-Cheat
 
 # Easy Anti-Cheat
 
-Sometimes, seemingly randomly, you can get an EAC error during the VRChat startup/login screen. It looks like a message box, with the title "Anti-cheat Error", no actual message text, and a single button labeled "Quit".
+Sometimes, seemingly randomly, you can get an EAC error during the VRChat startup/login screen. It looks like a message box, with the title "Anti-cheat Error", a message referring to a filepath that failed to validate integrity, and a single button labeled "Quit".
+
+- The filepath in the message always refers to a file within `steamapps/common/VRChat`.
+- The EAC error can trigger even when all these files are completely pristine.
+- The problem file can be different each time.
+- EAC doesn't care about any of the files in `AppData/LocalLow/VRChat`. This means yt-dlp.exe, logs, the local cache, etc are not subject to integrity checks.
+- Getting multiple EAC errors in a row is very possible. But if it triggers 10 out of 10 attempts in quick succession, call us.
+- Some EAC info is also written to the VRChat log file.
+
+<!--
+The message box used to have no actual message text. The message returned in a VRChat update, possibly on the serverside and without a steam depot update, sometime between 2024-03-25 and 2024-03-28.
+-->
 
 ## Recommended Workaround