I am running QGIS 2.18.3 I was recently creating a project that contained WFS layers that required logon details.
Now whenever I try to start QGIS it brings up the following window that cannot be dismissed.
I have tried editing the registry to remove all the recent projects form the list.
I have uninstalled and reinstalled QGIS but the problem persists.
Currently my QGIS is completely un-usable.