# Epic Games Launcher crashing, sometimes leading to full Windows blue screen **URL:** \ **Category:** Getting Started & Setup\ **Tags:** unreal-engine, question\ **Created:** [June 12, 2025, 10:40pm UTC](https://forums.unrealengine.com/t/epic-games-launcher-crashing-sometimes-leading-to-full-windows-blue-screen/2553957 "2025-06-12T22:40:41Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![akoithra](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@akoithra](https://forums.unrealengine.com/u/akoithra)\ **Post date:** [June 12, 2025, 10:40pm UTC](https://forums.unrealengine.com/t/epic-games-launcher-crashing-sometimes-leading-to-full-windows-blue-screen/2553957/1 "2025-06-12T22:40:41Z")
I’m having frequent crashes of the Epic Games Launcher, which sometimes lead to a full Windows blue screen. It appears to happen whenever I attempt to install a plugin like Metahuman or Diversion to an Engine version - in my case 5.4 - but also occurs unprompted on occasion. Once the Launcher crashes, and I restart it, the new plugins are queued, but never actually install - trying to start it results in “an unknown error”. Screenshots attached. I don’t believe this is related to the most recent Launcher update (has been happening for a couple of weeks - could well have been triggered by finally allowing Windows to upgrade to Win 11, or any one of the other Windows Updates). Unreal also appears to be crashing more frequently - in particular during intense renders with lots of animated SKMs (which it used to handle just fine before). I have tried the following: - uninstall and reinstalled the Launcher and Online Services - uninstall the Launcher and Online serves with Revo Uninstaller to ensure no remnants, and reinstalled - updated all latest Windows updates - updated NVIDIA to latest drivers (even experimented with rolling back a couple of versions) - removing Appdata/Local/EpicGamesLauncher - removing C:/ProgramData/Epic - removing the DerivedDataCache file - fully wiping my OS drive and re-installing Windows (yes, really) - this is still happening on a brand new Windows install with nothing new on it besides the Launcher, Unreal 5.4, and Chrome As you might imagine, I am pretty stymied - all help, advice, suggestions welcome. Windows 11 Pro 23H2 running on Intel i9-14900KF 3.2GHz w 128GB RAM and NVIDIA GeForce RTX 4090 Many thanks. ![Screenshot 2025-06-12 183219](https://d3kjluh73b9h9o.cloudfront.net/original/4X/8/f/a/8fa460ee50ba4fa06f98ddbdcb1d8fcf03e8df77.png) ![Screenshot 2025-06-12 183340](https://d3kjluh73b9h9o.cloudfront.net/original/4X/8/7/e/87ebe3fe8e3212d49303b8da7cc43b6d40594a83.png) ---
**Author:** ![AnasMh2025](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@AnasMh2025](https://forums.unrealengine.com/u/AnasMh2025)\ **Post date:** [June 12, 2025, 10:56pm UTC](https://forums.unrealengine.com/t/epic-games-launcher-crashing-sometimes-leading-to-full-windows-blue-screen/2553957/2 "2025-06-12T22:56:21Z")
I’m having the same exact issue, After I installed the Cesium, issue persists, and couldn’t fix it - Removed Appdata -Removed Local - Removed Regs still the same, EPIC must fix this urgently plz ---
**Author:** ![GameroTwitch](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@GameroTwitch](https://forums.unrealengine.com/u/GameroTwitch)\ **Post date:** [June 13, 2025, 12:30am UTC](https://forums.unrealengine.com/t/epic-games-launcher-crashing-sometimes-leading-to-full-windows-blue-screen/2553957/3 "2025-06-13T00:30:00Z")
Having the same issue. Nothing worked. Also completely deleted everything: All Unreal Engine Folders, all Epic folders (okay, Windows i didn’t) and once i try to install any plugin everything crashes. Can’t even open my UE project anymore because it isn’t able to detect the plugins i’ve installed before. This is a major issue unfortunately. ---
**Author:** ![jdiez.com](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@jdiez.com](https://forums.unrealengine.com/u/jdiez.com)\ **Post date:** [June 13, 2025, 6:37am UTC](https://forums.unrealengine.com/t/epic-games-launcher-crashing-sometimes-leading-to-full-windows-blue-screen/2553957/4 "2025-06-13T06:37:46Z")
Hi! I’m on a MacbookPro M2MAX 64gb Yesterday downloaded the Cesium plug in to the Launcher. Then prompted to install into the Engine. When I did that, immediately crashed the Launcher! After several reinstalls, the Launcher is not working. Fortunately I can open the projects directly with the Engine! But the Launcher is dead and no way to make it work. Seems a real bug and affects Windows & Mac. Epic Games please listen! ---
**Author:** ![jdiez.com](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@jdiez.com](https://forums.unrealengine.com/u/jdiez.com)\ **Post date:** [June 13, 2025, 7:56am UTC](https://forums.unrealengine.com/t/epic-games-launcher-crashing-sometimes-leading-to-full-windows-blue-screen/2553957/5 "2025-06-13T07:56:45Z")
Hello! I just used Chatgpt and worked!! (Mac version): Good morning! Thanks for sharing the crash screen and explaining the steps. It looks like the **Epic Games Launcher** crashes after installing the **Fab plugin for Cesium** , likely due to a plugin compatibility issue or corruption. Here’s a step-by-step plan to fix it: * * * ### ✅ **Step 1: Manually Remove the Fab Plugin** Unreal plugins can crash the launcher if they’re corrupted or incompatible. Since you mentioned the crash began after installing the Fab plugin: 1. **Navigate to your Unreal Engine plugins folder**. For example: 2. Look for any folder named **“Fab”** , **“Cesium”** , or anything related to the plugin you installed. 3. **Move or delete** those plugin folders (move to Desktop if you want a backup). * * * ### ✅ **Step 2: Clear the Epic Games Launcher Cache** Corrupted cache can also prevent the Launcher from starting. 1. Go to: 2. Delete the entire `Saved` folder: 3. Optionally, also delete: * * * ### ✅ **Step 3: Reinstall the Epic Games Launcher Cleanly** If you’ve only been reinstalling without clearing residual files, try this: 1. **Uninstall** the Launcher. 2. Then manually delete these residual folders: 3. Reboot your system. 4. **Download a fresh copy** from [https://store.epicgames.com](https://store.epicgames.com) and reinstall. * * * ### ✅ **Step 4: Launch Without Plugins (Optional but useful)** If the above doesn’t fix it, try launching Unreal Engine **without loading plugins** : 1. Open Terminal and run: This sometimes bypasses problematic startup steps. * * * ### ✅ Optional: Check Logs The crash reporter mentions logs are included. If needed, you can manually inspect logs here: ```auto ~/Library/Logs/Unreal Engine/EpicGamesLauncher.log ``` If the crash persists after this, feel free to share that log file — I can help analyze it directly. * * * Let me know if any step works or if you get a different message after trying these! Hello! I just used Chatgpt and worked!! (Mac version): Good morning! Thanks for sharing the crash screen and explaining the steps. It looks like the **Epic Games Launcher** crashes after installing the **Fab plugin for Cesium** , likely due to a plugin compatibility issue or corruption. Here’s a step-by-step plan to fix it: * * * ### ✅ **Step 1: Manually Remove the Fab Plugin** Unreal plugins can crash the launcher if they’re corrupted or incompatible. Since you mentioned the crash began after installing the Fab plugin: 1. **Navigate to your Unreal Engine plugins folder**. For example: ```auto /Users/Shared/Epic Games/UE_5.4/Engine/Plugins/Marketplace/ ``` (or whichever version you’re using) 2. Look for any folder named **“Fab”** , **“Cesium”** , or anything related to the plugin you installed. 3. **Move or delete** those plugin folders (move to Desktop if you want a backup). * * * ### ✅ **Step 2: Clear the Epic Games Launcher Cache** Corrupted cache can also prevent the Launcher from starting. 1. Go to: ```auto ~/Library/Application Support/Epic/EpicGamesLauncher ``` 1. Delete the entire `Saved` folder: ```auto EpicGamesLauncher/Saved ``` 1. Optionally, also delete: ```auto ~/Library/Logs/EpicGamesLauncher ``` * * * ### ✅ **Step 3: Reinstall the Epic Games Launcher Cleanly** If you’ve only been reinstalling without clearing residual files, try this: 1. **Uninstall** the Launcher. 2. Then manually delete these residual folders: - `~/Library/Application Support/Epic` - `~/Library/Preferences/com.epicgames.EpicGamesLauncher.plist` 1. Reboot your system. 2. **Download a fresh copy** from [https://store.epicgames.com](https://store.epicgames.com) and reinstall. * * * ### ✅ **Step 4: Launch Without Plugins (Optional but useful)** If the above doesn’t fix it, try launching Unreal Engine **without loading plugins** : 1. Open Terminal and run: ```auto open -a "/Applications/Epic Games Launcher.app" --args -SkipBuildPatchPrereq ``` This sometimes bypasses problematic startup steps. * * * ### ✅ Optional: Check Logs The crash reporter mentions logs are included. If needed, you can manually inspect logs here: ```auto ~/Library/Logs/Unreal Engine/EpicGamesLauncher.log ``` If the crash persists after this, feel free to share that log file — I can help analyze it directly. * * * Let me know if any step works or if you get a different message after trying these!