A couple tweaks I found necessary for the new 9926 build of Windows 10.
1. Windows Update failed with error 0x80070057 preventing the install of update KB3034229. The Fix:
Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsUpdate\UX] "IsConvergedUpdateStackEnabled"=dword:00000000 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsUpdate\UX\Settings] "UxOption"=dword:00000000
2. Only two size options for the updated start menu. Regular or maximized. This fix allows resizing of start menu to a custom size. However, it reverts the start menu back to the pre-9926 build style. Wish there was a compromise. I ended up just setting this to 1 and living with the lack of resize options.
Windows Registry Editor Version 5.00 [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced] "EnableXamlStartMenu"=dword:00000000