Unable to get the window handle for the ‘AxControl’ control. Windowless ActiveX controls are not supported

The solution turns out to be to turn off DEP for the machine that you're running Quality Center on.

On the CMD line, type: bcdedit /set {current} nx AlwaysOff

You'll then need to restart the machine.

To turn DEP back on, use the command : bcdedit /set {current} nx AlwaysOn