So recently, since i upgraded to the retail version of windows 10 (x64 ), I noticed that whatever i try to use any of the user interface elements in the UE4 Editor everything will slowdown to crawl, If my mouse is not on any UI element the editor goes back to normal speed but anything from hovering A Button or element in the content browser or any of the editor UI Elements makes the engine slowdown a LOT to the point where its almost unuseable Kinda feels like the engine thinks i have alt-tabbed out / minimized the engine window and it slowdowns…
Hi alvarofer0020,
We’ve had reports of poor performance with outdated graphics drivers. Have you updated your drivers since moving to Win10? Can you send along your dxdiag?
-.
Hey, Yes i do have updated my drivers and sure here is my dxdiaglink text
Dxdiag indicates that you’re not on the absolute latest drivers. Please update to these drivers.
-.
EDIT: Could you also try downloading the 4.9 Preview build and tell me if the same issue is still occurring?
Hey, i tried both updating my drivers and using the 4.9 Preview and still the issue persists, it even happens with the Tooltips on the Launcher
I even tried a clean install of windows and the result is still the same
Ok so i think i might have found the source of the issue, cleaning the all of the Windows Notifications from the Notifications Windows before opening the Launcher and the Engine seems to fix the issue, no more tooltip slow downs!
Thanks I’ve added this info to our Software Conflicts wiki. I’ll try to repro in house and if I can, I will enter a bug. No guarantee though that this is an engine bug and not a Win10 bug.
-.
Hello guys !
I’ve the same problem.
My viewport is very fast but the Unreal engine UI (Modes, World Outliner, Content Browser, …) is slow.
Can you help me ? I have tried to clean the windows notification but nothing change.
Thank you 
Hi Saphir88,
Could you open up a new AH thread for this issue? If the same fix doesn’t help you then it’s a separate bug. We’ll be able to investigate it more thoroughly without cluttering up this thread.
-.
Having the exact same problem (extremely slow response with everything except the viewport) after upgrading; tried to clean notifications, but there are none. Tried fresh install of Epic Launcher and UE4, absolutely the newest drivers for sure, didn’t have this issue before upgrading. Any help is much appreciated, thanks.
Asus G75VX 670MX 3GB GDDR5 18GB DDR3 3.2 Intel i7; had no issues before this
One thing I have noticed since upgrading to Windows 10 is if you use any program like MSI AfterBurner or EVGA Precission X the OSD for the RiviaTuner/Server will mess with UE4 4.9+ you either need to uinstall them or turn them off and shut down the RiviaTuner Server if it’s up which it normally has it’s own icon that looks like a monitor with purple number in the corner. Apparently how Windows 10 handle graphic hooks conflicts with On Screen Display and UE4 mainly for those programs. I have an i7 950 3.06Ghz (3.3 Boost), 24GB DDR3 G.Skill RAM and a Titan X 12GB so ya even with that machine just having AfterBurner/Precission X/RiviaTuner on/running really kills performance. Hope it helps some.
Hey Affebonbons,
Can you check the Software Conflicts page(see my previous comment) for some of the issues that Keiyentai has mentioned. If none of those issues are present, please open a new Answerhub thread as this one is rather old.
-.
For those coming here from google, here’s what I did (based on the software conflicts page):
-
Disabled the action (notification) center altogether. I added a 32 bit DWORD key in regedit:
[HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\Windows\Explorer]
name: DisableNotificationCenter
value: 1
…you can set this to 0 or delete the key if you want your notifications back.
This only marginally improved performance. The real fix was:
-
Found Sonic Suite 2 running in my system tray. Right click / Exit.
This alleviated all UI-based performance issues for me.
Icon:
On a related note, it also fixed this:
- Created a simple 1st person project and opened it.
- Double clicked the HUD blueprint to edit (and moved the tab to the main window).
- Clicked Play (with the blueprint editor open the play begins in a new window instead of the 3d viewport).
- Game began playing but at like 2 frames per second.
- Hit escape and switched back to the 3d editor window, game plays fine in the 3d viewport.
Shutting down “Sonic Suite 2” solved this as well.
FWIW,
- M
Hey ,
Thanks for adding this!! I’ll still be accepting the other answer, but I’ve added a link to this Answerhub thread to the Software Conflicts page as a more permanent solution to the Windows10 notifications issue.
-.
EDIT: Throwing some karma points your way since we can only accept one answer
Part 2, quitting “Sonic Suite” fixed this for me on my clean install of Windows 10 and Unreal Engine 4.14.1.
I would have not found the solution otherwise, thanks for the fix Zorque.
Thanks, zorque, for that regedit tip. It transformed my editor from an unusable 25fps/40ms to 120fps/8ms 
. I still get a huge performance drop when hovering over UI elements but disabling the Windows 10 notification centre has made a massive difference for me.
Update: Seems that was part of the issue. The other thing that I need to do if I want to see usable performance in the editor is to turn the machine on, close down everything in the taskbar (eg Razer Surround, Duet, Steam, Nvidia), not open other programs, then open the Unreal Editor. If I do all this I get my 120fps/8ms editor performance.
How to Make Windows 10 PC fast
- Disable Background Apps
Go to Settings → Privacy → Background apps and disable all unwanted apps running in background consuming your precious data and CPU. - Disable unwanted Startup Programs
- Delete Temp Files
- Delete Prefetch Files
Source:- http://merabheja.com/make-your-windows-10-pc-ultra-fast/
Very good Alva! Notificayions is what causes it! Thanks…