I am getting a message in Lightroom 5 that keeps popping up. I don't understand it. It says Aux Backup has something to say... unable to check for newer version of 'rc Aux Backup' - Web server did not respond to http request
I do not know this plug-in but I would try:
goto File->Plugin Manager and deaktivate the "rc Aux Backup" plugin until the server problems are fixed.
You can also try to deactivate the "check for updates up startup" feature of this plugin.
You were right, it was a plug-in. I removed it. I hope it works now.
I'll try to restart lightroom.