Win10 10074 start menu can not open solution

After upgrading from 10061 to 10074, the start menu cannot be opened. According to the online tutorial, the start menu cannot be opened after downloading KB3061161, KB3061162, and KB3038314. Instead, the taskbar can't be opened.
Try again to update the graphics driver, because the automatic update failed, so search for the graphics card driver with the keyword 1000M in the above URL, find the latest version of NVIDIA driver update for NVIDIA Quadro 1000M, the menu is still not working after the installation is successful.
win10 10074 Start menu can't open solution
Finally found to be a language pack problem, install English (US) language pack in settings and regional options - for Windows Technical Preview based on x64 system - (KB3061055) [en-US_LP], the problem is solved, the long-lost start menu is finally back. The above ideas are for your reference.