"This application failed to start because..." in Qt5.7.0

[alsa]

After debugging my program using Qt 5.7.0 in Windows (with MinGW 5.3.0 32 bit), I compiled Release version to use it on a different PC. Insert all requested dll's, but on the first PC (where I developped my program) all is ok, while in the new the following error message appears:
"This application failed to start because it could not find or load the Qt platform plugin "windows" in "".
Reinstalling the application may fix this problem".

I try to copy "qwindows.dll" on the same dir where I place my executable: nothing to do.
Make a subdir called "platform" with "qwindows.dll" in: nothing to do.
Copy all platforms (qwindows.dll, qwindowsd.dll, qoffscreen.dll, qoffscreend.dll, qminimal.dll, qminimald.dll) in the same folder where I place executable: nothing to do.
How to solve it?

[SGaist]

Hi,

To simplify deployment you can use the windeployqt helper.

You can also take a look at this wiki entry about Windows deployment.

[alsa]

@SGaist Done! Solved!!