I know that this is an old thread, but I decided this needs to be posted. I had the same issue, and after looking for ages I found this. Go to Control Panel and then Appearance and Personalization. Click where where it says "Show hidden files and folders". It's right next to folder options, then check the box for "show hidden files, folder, and drives". Click Ok. Now, navigate to Your drive (mine is C: ) Then go to Users\ (your user)\ AppData\ Roaming\ Microsoft\ Windows\ Themes. If there's a wallpaper(s), delete it. If there's an .ini file, open it with Notepad and erase the contents. Now reboot, worked for me.