Unreal:Software Conflicts

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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