Games Using EasyAntiCheat

Hi! Your issue is not exactly the same as mine, but I recently had an Easy Anti-Cheat / Epic Online Services problem with Apex Legends and managed to fix it.

Since you already reinstalled EAC, I wanted to mention the exact way I did it, because simply running the installer again did not fix my issue.

What I did:

1. **Completely delete the EasyAntiCheat folder** from the Apex Legends installation directory.

2. After deleting it, use your game launcher’s **Verify / Repair game files** option so it downloads a completely fresh copy of Easy Anti-Cheat.

* In my case, I was using Steam, so I used **Verify integrity of game files**.

* If you are using another launcher, use its equivalent file verification or repair option.

3. Press `Win + R`, type `services.msc`, and open Windows Services.

4. Find **Epic Online Services** and check its Startup type.

I changed mine to **Automatic**.

5. I also ran the following commands in Command Prompt as Administrator:

`sfc /scannow`

`DISM /Online /Cleanup-Image /RestoreHealth`

6. I checked whether any old ASUS drivers such as `CmUpx.sys`, `AsUpIO.sys`, or `AsIO.sys` were still present in Windows, since old low-level drivers can sometimes conflict with EAC. None of them were present on my system, but it may still be worth checking if you have or previously had ASUS software installed.

7. After finishing everything, I restarted the PC.

After doing these steps, the Easy Anti-Cheat window finally opened normally and Apex Legends started successfully for me.

Your case may have a different cause because both Fortnite and Apex are making the entire PC go to a black screen, so I cannot guarantee this will fix it. But if your previous EAC reinstall did not involve completely deleting the EAC files first, I think the fresh reinstall method and checking Epic Online Services are worth trying.

If it still happens, I would also check Windows Event Viewer immediately after the crash to see whether it records an EAC, driver, GPU, or system error.

Hope this helps!

Thanks for the reply. After following your steps, then verifying game files it seems that Epic Online Services doesn't show up in services.msc, however in the Apex directory the EasyAntiCheat folder is there. 

Thanks for checking and for sharing the screenshots.

First, I need to correct one part of my previous reply. I mistakenly told you to check Epic Online Services in services.msc. I confused the “EOS” name used by Easy Anti-Cheat with Epic Online Services.

So please ignore steps 3 and 4 from my previous message regarding Epic Online Services and its startup settings. I’m sorry for sending you down the wrong path.

In my own case, I checked the Easy Anti-Cheat logs and found that they specifically mentioned an old ASUS-related driver called CmUpx.sys that needed to be unloaded before the game could start. After I stopped and disabled the CmUpx service, Apex Legends started normally again.

However, your situation may have a different cause, since both Apex Legends and Fortnite are causing your entire PC to black-screen.

If possible, could you check your Easy Anti-Cheat logs and see whether they mention CmUpx.sys, another driver name, or any specific error?

If CmUpx.sys appears in the log, please let me know. I can then explain the exact steps I used to fix it.

Again, I’m sorry for the incorrect information in my previous reply, and thank you for taking the time to check everything and provide the screenshots.

I tried checking the logs but there seem to be no error message. When I launch Apex or Fortnite, the PC would crash and get a black screen but my laptop keyboard lights are still lit up. When I try to run EasyAntiCheat_EOS_Setup, a terminal would pop up for a split second and close immediately afterwards.