# can anyone help me ? i have probleme , when i lunch UEFN it says says corrupt or missing files detected

**URL:** <https://forums.unrealengine.com/t/can-anyone-help-me-i-have-probleme-when-i-lunch-uefn-it-says-says-corrupt-or-missing-files-detected/2721174>\
**Category:** Issues and Bug Reporting\
**Tags:** unreal-editor-for-fortnite, bug-report, editor, question\
**Created:** [May 10, 2026, 2:12pm UTC](https://forums.unrealengine.com/t/can-anyone-help-me-i-have-probleme-when-i-lunch-uefn-it-says-says-corrupt-or-missing-files-detected/2721174 "2026-05-10T14:12:44Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![Jimbohalo10](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jimbohalo10/32/961440_2.png) [@Jimbohalo10](https://forums.unrealengine.com/u/Jimbohalo10)\
**Post date:** [May 10, 2026, 7:06pm UTC](https://forums.unrealengine.com/t/can-anyone-help-me-i-have-probleme-when-i-lunch-uefn-it-says-says-corrupt-or-missing-files-detected/2721174/2 "2026-05-10T19:06:23Z")

</div>

hi @M.e.h.d.i .

This is possibly because directory

C:\Users%USERNAME%\AppData\Local\ **FortniteGame**

is corrupted and possibly the directory files

C:\Users%USERNAME%\AppData\Local\ **UnrealEditorFortnite**

When deleted

Uninstall The Epic Games Launcher (EPGL)

Restart PC

Download a new version of Epic Games Launcher and login

In EPGL Verify the installation

[How to verify UEFN/Fortnite](https://forums.unrealengine.com/t/urc-exe-and-urc-dll-get-flagged-as-malware-from-microsoft-defender/1802519/5)

Launch Fortnite from EPGL

load the Creative Island then shutdown Fortnite .

Launch UEFN from EPGL

---

_[View the full topic](https://forums.unrealengine.com/t/can-anyone-help-me-i-have-probleme-when-i-lunch-uefn-it-says-says-corrupt-or-missing-files-detected/2721174)._