This is still a problem for me with 4.0.4.
Remoting into a server (Windows Server 2012 Essentials) running TeamViewer, the server logs you in normally, but the desktop is black and the taskbar is just the Classic Shell button and the rest is all grey, and no icons appear in the systray. Apps that run on login, like Dropbox, don't update themselves and appear to be hung. Their presence does appear in the process list.
Pressing Alt+Tab shows a few odd items, one of which is "Immersive Background", and the Alt+Tab dialog is the old school version, like mentioned here -
https://superuser.com/questions/537722/ ... -windows-8.
Something about pressing Alt+Tab and selecting an app, going to Metro then coming back seems to kick it loose, and all the desktop and systray icons show up, the program dialogs that should be on screen do appear, the Alt+Tab dialog box becomes the new large-thumbnail version, and then the programs in the systray finish loading and everything is OK until the next reboot.
I have not changed the registry setting alluded to in that SuperUser article, as I figured I should post with you guys and see if you are aware of the issue, or not, first.
Thanks for a great product!