Updating QGIS version through OSGEO4W - Unable to get setup.ini

I want to update the QGIS versions that I am using through OSGEO4W. I am currently running QGIS 2.0.1-Dufour (and also have an QGIS 191a229 version) on Windows 7. However, when I go through the advanced installation in OSGEO4W Setup and either select "Direct Connection" or "Use IE5 settings" I get the following message: Unable to get setup.ini from http://ift.tt/16LkMuD. This is not the first time I have updated QGIS versions and I have always gone through "Direct Connection" without problems - this message has never popped up before. As a result, no progress is made and I have no other option than to shut OSGEO4W. Does anyone know why this is happening and what is the best way around this? I am thinking of either installing a standalone version of QGIS or deleting the whole OSGEO4W folder and starting over again.