Is Back 4 Blood not launching or does Back 4 Blood crash on startup/launch in Windows 11?
Here, many useful solutions to fix the Back 4 Blood issues are introduced.
And it is compatible with Windows 11 now.

Sometimes when launching Back 4 Blood, it will start stuttering and eventually crash.
This software is not compatible with the anti-cheat system of this game.
It cannot be disabled completely and you must uninstall it from your Windows 11 PC.

Step 1: Launch Control Panel in Windows 11 via the search box.
Related article:How to Open Control Panel in Windows 11?
[7 Ways]
Step 2: View all the items byCategoryand clickUninstall a programfromPrograms.
Step 3: FindWebroot, right-press it and chooseUninstall.
After the uninstallation, restart Back 4 Blood and see if it can run properly.
How to do this work?
And you’re able to fix this issue by running EAC as administrator.
Step 1: Launch Steam, go toLIBRARY, and find Back 4 Blood.
Step 2: Right-select it, chooseManageandBrowse Local Files.
Then, open theEasyAntiCheatfolder.
Step 3: Right-clickEasyAntiCheat_Setup.exeand chooseRun as administrator.
See how to verify file integrity on Steam:
Step 1: Open Steam and go toLIBRARY.
Step 2: Right-click Back 4 Blood and chooseProperties.
Step 3: ClickLOCAL FILESand tap onVerify integrity of game files.
Just go to the Steam library, right-punch Back 4 Blood and chooseProperties.
Under theGeneraltab, clickSet launch, bang out-windowed noborderand clickOK.
Upgrade Graphics Card Driver
An out-of-date graphics card driver can lead to Back 4 Blood crashing/not launching.
To fix this issue, you should upgrade the GPU driver to the latest version in Windows 11.
Here is a related article for you How to Update Drivers in Windows 11?
Try 4 Ways Here.
Open this game, go to theOptionstab, clickGraphics, and set the quality toLowunder thePost Processing Qualitymenu.