The problem is here:
Meaning that the viewer tries to read again and again the outfit.xml file and apparently fails (this file is used to store your outfit on log off and it is used on log on to restore your avatar multiple wearable layers and multiple attachments since the server only keeps track of one layer per type and one attachment per joint). Somehow, this file probably got corrupted...
Simply delete the "C:\Users\Maria X Nikas\AppData\Roaming\SecondLife\nina_pizzicato\outfit.xml" file (while the viewer is not running) and relog.