If you've been having trouble downloading and installing Windows 10 preview build 14986 since its release earlier this week, Microsoft has now provided a workaround (via Neowin). Thankfully, the Microsoft-backed fix is a rather simple solution that was initially found and detailed by Windows Insiders.
All that's required to get the download working is to run a simple troubleshooter. From Microsoft:
This tool performs a number of actions which will get you back to a clean update state. You will need an active internet connection to download this tool and to re-download build 14986 as needed. Once the tool has completed, return to the Settings panel and re-scan for updates. 14986 should download as expected.
So, if you were running into error 80240031, try running the tool and let us know if it works for you. Do note that if you previously tried any solutions that involved editing registry keys, Microsoft recommends resetting them back to their original values because the temporary fix will impact your ability to receive future updates.
Update: It looks like this solution still isn't resolving the issue for some. We'll provide an update if Microsoft outlines another fix or workaround for those still having issues.
