When starting UE 4.10 editor, I get 4 error messages. It says “vrmonitor.exe - System Error” and that the following 4 DLLs are missing on my computer:
Qt5Core.dll
Qt5Gui.dll
Qt5Network.dll
Qt5Multimedia.dll
After the four messages the editor starts up.
When I launch the game in standalone mode, the four error messages appear again before the game starts.
Re-installing 4.10 did not help.
I verified my 4.10 installation like you said. I think it passed because there was no error message from the verification. The vrmonitor.exe error messages still appeared when launching 4.10 however.
I found that vrmonitor.exe belongs to SteamVR, so I uninstalled SteamVR. Now the vrmonitor.exe messages have disappeared.
I am happy to hear that your issue has been resolved. I will be marking your last comment as the answer for this thread. If this issue returns please feel free to reopen this issue with any additional information you may have and I will be happy to assist you further.