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For two days I've been getting this message on startup: 'This application failed to start because it could not find or load the Qt platform plugin 'Windows' I have absolutely no idea what this means, and my computer is working normally except that Firefox is no longer functioning. This application failed to start because it could not find or load the Qt platform plugin 'windows'. Renoise forum. It worked fine, problem came up, I reinstalled, same problem again after a restart and redone the reinstalled and getting same problem again.

I got this issue and how I solved it: • Used dependency walker() to see the exact path of the dlls needed. Try it because both QtCreator and QT framework both have the same dlls and you must pinpoint the exact ones used. I copied all dlls needed in the same folder as the app.

• I have copied the folder platforms from QT framework /plugins and copied it in the same folder as the app. Now the app comtained also plugin/platform/ folder with all its dlls • And the most important step in my case is to create a file named qt.conf in the same folder as the app. This file should contain the path to the plugins.

My qt.conf file contains: [Paths] Libraries=./lib/qtcreator Plugins=plugins Imports=imports Qml2Imports=qml. I have looked through all of the questions that appear to be related on, and none of the solutions seem to help me. I created a platforms directory next to my exe location and put qwindows.dll inside, but I still received the 'Failed to load platform plugin 'windows'. Available platforms are: windows' error.

I had copied qwindows.dll from C: Qt Qt5.1.1 Tools QtCreator bin plugins platforms, which is not the right location. I looked at the debug log from running in Qt Creator and found that my app was looking in C: Qt Qt5.1.1 5.1.1 mingw48_32 plugins platforms when it ran in the debugger. When I copied from C: Qt Qt5.1.1 5.1.1 mingw48_32 plugins platforms, everything worked fine.