Win10 preview version 9879 can not automatically update how to solve

  
Microsoft released the Win10 Build 9879 preview update in the early hours of the morning. Users can get updates by "Update & Restore" —“Preview buildings" in the <;PC Settings>
Many friends chose to use the system auto-update feature to upgrade the new version of Win10 Preview 9879, but some friends found that there was no update after clicking Preview buildings. As shown below:

In fact, the solution is very simple, just select “Fast” in the drop-down menu on the right, and then click the “Check now” button, you will receive the download prompt after a while.

Click on “Download now” at this point to start the download.

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