Maximum PC: Around one out of 10 Windows 10 users ran into trouble when trying to install a update intended to fix a problem that was causing Explorer.exe to frequently crash following an upgrade to Windows 10 Build 9879. The problem was further exacerbated by the fact that Microsoft said it didn't have a new build planned until early 2015. If you're one of the people who ran into trouble, here's a heads up that Microsoft has released a hotfix to address the issue.