# \[Fixed by MS for 36.30\] 36.20 Unreal Revision Control urc.exe problems caused by Windows 11 Defender

**URL:** <https://forums.unrealengine.com/t/fixed-by-ms-for-36-30-36-20-unreal-revision-control-urc-exe-problems-caused-by-windows-11-defender/2606723>\
**Category:** Issues and Bug Reporting\
**Tags:** fortnite-creative, unreal-editor-for-fortnite, fortnite\
**Created:** [July 16, 2025, 1:03pm UTC](https://forums.unrealengine.com/t/fixed-by-ms-for-36-30-36-20-unreal-revision-control-urc-exe-problems-caused-by-windows-11-defender/2606723 "2025-07-16T13:03:08Z")\
**Posts on this page:** 3\
**Page:** 1

<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:** [July 16, 2025, 1:03pm UTC](https://forums.unrealengine.com/t/fixed-by-ms-for-36-30-36-20-unreal-revision-control-urc-exe-problems-caused-by-windows-11-defender/2606723/1 "2025-07-16T13:03:08Z")

</div>

### Summary

This has happened because the new updated version of urc.exe has gone into the isolation box of Windows Defender. This was first reported [here](https://forums.unrealengine.com/t/urc-exe-and-urc-dll-get-flagged-as-malware-from-microsoft-defender/1802519/2)

### Please select what you are reporting on:

Unreal Editor for Fortnite

### What Type of Bug are you experiencing?

Unreal Revision Control

### Steps to Reproduce

Force Windows 11 Windows Defender scan follow the procedure in the above

### Expected Result

Nothing because Microsoft Windows Defender, template said it was safe

### Observed Result

Defender isolates urc.exe as virus

### Platform(s)

Windows 11

### Additional Notes

Same fix as 29.60 [here](https://forums.unrealengine.com/t/urc-exe-and-urc-dll-get-flagged-as-malware-from-microsoft-defender/1802519/2)

---

<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:** [July 16, 2025, 4:44pm UTC](https://forums.unrealengine.com/t/fixed-by-ms-for-36-30-36-20-unreal-revision-control-urc-exe-problems-caused-by-windows-11-defender/2606723/2 "2025-07-16T16:44:59Z")

</div>

hi all,

Look at this post first

[Fortnite Ecosystem v36.20 with Known Issues - with Unreal Revision control URC.exe](https://forums.unrealengine.com/t/fortnite-ecosystem-v36-20-with-known-issues/2605008/4)

[Revisions Control causes UEFN to softlock! - General / Issues and Bug Reporting - Epic Developer Community Forums](https://forums.unrealengine.com/t/revisions-control-causes-uefn-to-softlock/2603915/3)

Please make sure you set your anti-virus to ignore urc.exe as other virus checkers may isolate as a virus

Veuillez vous assurer de configurer votre antivirus pour ignorer urc.exe car d’autres vérificateurs de virus peuvent l’isoler comme un virus.

Bitte stellen Sie sicher, dass Sie Ihr Antivirenprogramm so einstellen, dass es urc.exe ignoriert, da andere Virenscanner es möglicherweise als Virus isolieren.

Por favor, asegúrate de configurar tu antivirus para ignorar urc.exe, ya que otros verificadores de virus pueden aislarlo como un virus.

Fixed in Windows Defender by Microsoft for 36.30.  
Can be closed

---

<div class="post-metadata">

**Author:** ![CrimsonWonder](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@CrimsonWonder](https://forums.unrealengine.com/u/CrimsonWonder)\
**Post date:** [August 1, 2025, 3:15pm UTC](https://forums.unrealengine.com/t/fixed-by-ms-for-36-30-36-20-unreal-revision-control-urc-exe-problems-caused-by-windows-11-defender/2606723/3 "2025-08-01T15:15:23Z")

</div>