This is all I have:
[32984] 05:16:38.495 9 AudioDeviceSession OnStateChanged Active *SystemSounds {0.0.0.00000000}.{b46519a5-7927-44aa-a3f1-fe75ed6eef06}|#%b{A9EF3FD9-4240-455E-A4D5-F2B3301887B2}|1%b#
[32984] 05:16:39.495 5 AudioDeviceManager-(Playback) OnPropertyValueChanged {0.0.0.00000000}.{b46519a5-7927-44aa-a3f1-fe75ed6eef06} 9855c4cd-df8c-449c-a181-8191b68bd06c,0
[32984] 05:16:39.835 5 AudioDeviceSession OnStateChanged Inactive *SystemSounds {0.0.0.00000000}.{b46519a5-7927-44aa-a3f1-fe75ed6eef06}|#%b{A9EF3FD9-4240-455E-A4D5-F2B3301887B2}|1%b#
[32984] 05:16:48.313 UI WindowsTaskbar Current: Location=Bottom, AutoHide=False, Taskbar=134860, Size=[Left=0,Top=1400,Right=5120,Bottom=1440], Monitor=Screen[Bounds={X=0,Y=0,Width=5120,Height=1440} WorkingArea={X=0,Y=0,Width=5120,Height=1400} Primary=True DeviceName=\\.\DISPLAY3
[18180] StartIsBack: forbiding XAML launcher to start
[32984] 05:16:53.831 UI ShellNotifyIcon Update NIM_MODIFY Failed: 2147500037
[18180] StartIsBack: XAML kicked in [31 ms]
Alt+Tab seems to work fine UNTIL I try to use Win+Tab, then both don't work (until an explorer restart). Nothing interesting appears in DebugView after that though.