Win10 preview version can not be upgraded after modifying the registry solution

win10 preview version can not be upgraded after modifying the registry how to do? Some users encountered win10 preview version can not be upgraded after modifying the registry. In this regard, the relevant person in charge of Microsoft gave the win10 preview version to modify the registry and can not upgrade the solution, let's take a look at it!
The first Win10 preview version was released in October last year, and the network shared the registration by modification. The method of viewing the latest version in the system, but modifying the registry has caused many users to not upgrade to the public version released by Microsoft.

When the user tries to change the registry to view the new version, the system will request an upgraded version that is not allowed to Windows Update, causing Windows Update to prompt 0x80246017 error and the system cannot be upgraded normally. At this point, you can solve the problem by:
• Open the run by Win+R, enter regedit and press Enter to open the registry;
• Expand the location HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsSelfHostApplicability
• Find the BranchName and determine its value FBL_IMPRESSIVE, if not please change;
• find ThresholdRiskLevel to change its value to low
• If you can find ThresholdInternal, delete it
• If you can find ThresholdOptedIn, delete it
Complete After the above steps, the contents of the registry should look like the following:

Gabe Aul said that the above method can solve the problem encountered by users, but Microsoft is still looking for the perfect solution for the public