I have found a solution for the problem:
I renamed the PLUGINS folder and just added an x in front (xplugins).
I then refreshed the admin page and could see everything. All the plugins will then be disabled and you can change the folder name back to the original name.
Now you can enable the plugins one by one and see which one causes the problem.
I have exactly the same issue, the only thing I can see is:
WordPress 4.4.2 is available! Please update now.
The Please Update now is a link, and if I click on that, nothing happens!!
