Unreal:Software Conflicts

This is where we would like to collaborate with the community and gather together a list of software that conflicts with Unreal Engine 4. Whether it's the editor, packaged games, or even the launcher we would like to know what other software doesn't play nice.

Please feel free to add to this list if you encounter any Software Conflicts. We would appreciate it if you could provide the software name, version number, Windows Version, UE4 Engine Version that you're using, a short description of the conflict, and a workaround (if known).

 NOTE:  While a conflict may be listed with a specific version number(Software, OS, or UE4), it is
 possible that it is not isolated to that version

Windows

Major Conflicts

Software	Version #	Windows Version	Discovered in UE4 Version:	Description	Workaround
Lucid Virtu MVP (GPU Management)	2.1.227/3.0.109	8.1	4.7.6	Allows easy switching between integrated and discrete graphics. Known to launch the editor in an "invisible" state.	Uninstall
Nvidia Optimus (GPU Management)	N/A (Latest Nvidia Drivers)	All	4.7.6	Crash while building lighting
Nvidia Optimus (GPU Management)	N/A (Latest Nvidia Drivers)	Win7 Only	4.9	Optimus does not switch to Nvidia GPU when running the editor	This occurs with all 64bit software on Win7 with Optimus. See Here
Kaspersky Antivirus	15.0.2.361	All	4.7.6	Most issues with antivirus come up when building code or launching the editor. UBT and UHT are sometimes flagged as suspicious programs and quarantined.	Add UE4Editor.exe to your firewall and Antivirus exceptions list. Post to Answerhub if this does not help.
Avast Antivirus	2015.10.2.2218	All	4.10.0	Most issues with antivirus come up when building code or launching the editor. UBT and UHT are sometimes flagged as suspicious programs and quarantined.	Add UE4Editor.exe to your firewall and Antivirus exceptions list. Post to Answerhub if this does not help.
Some USB Video Card Drivers	N/A	All	4.7.6	Known to cause possible memory leaks and display driver crashes	Uninstall
DisplayLink Drivers	N/A	All	4.8.0	Crashes editor on launch with old drivers. Throws D3D11 errors in callstack.	Update drivers or uninstall
Intel Integrated Graphics Video Drivers	10.18.10.####	All	4.8.0/1	Crash/Freeze while building lighting or Shader Compiling	Update to latest version NOTE: Intel Software will tell you that your drivers are up to date. It is a lie. Locate your CPU at the Intel Download Center and you'll find the latest drivers.
Windows 10 Notifications	N/A	Win10	4.9	Performance problems when mousing over UI in the Editor	Clear all notifications. See both answers here for a more permanent solution
EVGA PrecisionX	5.3.8	All	4.9	Performance problems when mousing over UI in the Editor	Turn off or uninstall EVGA PrecisionX
MSI Nahimic Sound Enhancement	1.2.3	All	4.10	Editor freezing in color picker and after opening BP classes. Slowdown when using the toolbars/UI outside of the editor viewports.	Disable Nahimic
Sonic Suite 2	2.2.16	All	4.9/4.10/4.11 Preview	Performance problems when mousing over UI in the Editor	Disable Sonic Suite 2
AMD Drivers with R9 200/300 Series	All	All, Windows 10	4.10, 4.11-pre6	Driver Crashes, Freezing, etc	See solutions here.
AMD Crimson Drivers	15.12 and later	All, more so Win10	4.10	Intermittent Editor Crashes, freezing, etc	See solutions here.
Networx Bandwidth Monitor	Any Version	All	4.11	Client's show black screens and their Begin Play functions aren't called in PIE when using a Dedicated Server	Disable Networx

Minor Conflicts

Software	Version #	Windows Version	UE4 Version	Description	Workaround
Synergy	1.7.1	All	4.7.6	Has been known to cause viewport navigation issues on client PCs	No known workaround
Teamviewer	10	All	UT 5/28/2015	Keeps UT from running fullscreen	Open Teamviewer. Options>Advanced>Show Advanced Options>QuickConnect button>Configure. Add ...\Program Files\Epic Games\UnrealTournamentDev\Engine\Binaries\Win64\UE4-Win64-Test.exe

Mac

Software	Version #	OSX Version	UE4 Version	Description	Workaround
Avast Mac Security 2015	11.9 (46174)	10.11.4	4.11.2	SwarmAgent.exe is quarantined during engine download, causing it to fail.	Open Avast, go into the virus container, then secondary-click the file, choose to submit to virus lab. Fill out the popup to submit as false alarm. Then re-attempt download, it should work now.

Linux

Software	Version #	Linux Version	UE4 Version	Description	Workaround
Example	Example	Example	Example	Example	Example