I just installed the Win10 TP Build 9879 on an Acer S7-392-9460 ultrabook. Installation was successful with no glitches and afterwards I was easily able to join my Windows 2008 R2 domain with absolutely no hiccups.
I then added the Control Panel to the Start Menu and noticed that the sliding submenu only show the recent items. See below. Is there any way to change the default behavior so that it shows ALL the Control Panel items instead of just the recent items?