After running Network Setup Wizard several times configuring different possibilities I finally decided I will not share any of my folder on the network.
But now my Shared Documents folder got stuck. I do not know exactly what I did to deserve this but now it is named only Documents instead of Shared Documents and is not accessible.
You can boot up in Safe Mode, right-click on the Shared Documents folder and change the permissions to gain access. If no user has access to the folder, then you need to first add a user account there, close the dialog box, reopen the dialog box and add the permissions.
Bought a T430 on ebay and the battery is stuck. The release latch cannot be moved to the unlock position. Just to the right of the latch, you can see...