Have you tried to log in in private mode?

CHROME

1. Click on the Chrome menu and select 'New Incognito Window'
2. You can also use the keyboard shortcut Ctrl+Shift+N to launch it

INTERNET EXPLORER 11

1. Click on Settings > Safety > InPrivate Browsing
2. You can also use the keyboard shortcut Ctrl+Shift+P to launch it 

FIREFOX

1. Click on Settings > New Private Window
2. You can also use the keyboard shortcut Ctrl+Shift+P to launch it