What should I do if the Win10 Build 9879 preview is not automatically updated?

Win10 Build 9879 is a preview version released by Microsoft on November 25 last year. Many users will update and restore the system through the Metro interface “PC settings”. Many users will still get automatic updates through “Preview buildings”. Recently, users have clicked. Preview buildings to Win10 preview version 9879 upgrade found that the problem can not be automatically updated, let's take a look at the simple solution.

Win10 Build 9879 preview can not be automatically updated Solution /Steps:
1, the solution is very simple, just select "ld" in the drop-down menu on the right, and then click the "Check now" button After a while, you will receive a download prompt.

2. Click on “Download now” to start downloading.
The question is coming, why is this Win10 preview version 9879 to receive updates after this selection?
The following is a brief explanation of the Microsoft Win10 preview push mechanism with the users. As shown below:

After each Win10 preview version is produced by the development department, it must undergo a layer-by-layer review, and the requirements from the innermost layer to the outermost layer are gradually stricter. The Build 9879 version introduced this time belongs to the fourth level of Fast, compared with the last Build9860 version (divided into the outermost Slow level), the theoretical reliability is relatively poor, but it can also participate in the preview version. A more stable version released by the beta user of the test. Therefore, according to the level of division, this update should be selected in “Preview buildings” in the above-mentioned “Fast” to receive.