Set win7 to dual monitor mode，then start QT Creator,then drag it to the second monitor(the windows task bar residents on the first monitor),and maximize it on the second monitor,then close it.Then start it again,it crashed.
We can set the system to single monitor mode,so QT Creator is forced to be in the first monitor when started,so we can start it again.So the problem is that when QT creator starts in the second monitor ,it will crash.
And if you cannot reproduce this problem,maybe it is related to hybrid graphics card in win7,we have both intel card and AMD card on the same machine.On our machine ,it crashed in aticfx32.dll.