you can no longer drag a website from IE9 into the taskbar and have it act like an app shortcut on the taskbar....when you do this now it also drags another instance of the pinned IE9 shortcut in then fails to launch the saved site.
startup MSHelp the mentioned log locates in C:\Users\{User}\AppData\microsoft.help_8wekyb3d8bbwe\Temp
Not sure where you got your wallpapers, if it was included in your iso install then the build was altered. Here are the official wallpapers (unaltered). windowscommunityforum.com/windows-8-general-discussion/771-windows-8-wallpapers.html