The Windows Insider Preview program lets you run early versions of the upcoming Windows 10 builds. You can test new features, provide development feedback, and help shape the development of Windows 10. However, at times, your Windows 10 Insider Preview build might expire. That is, Microsoft no longer supports the preview version of Windows you are using and then the “This build of Windows 10 will expire soon” error starts to appear. So, how do you fix the error? What Is the “This Build of Windows Will Expire Soon” Error? The Windows Insider Preview program allows you to use new Windows 10 versions before general release.