Git for Windows crashes on Windows 10

I'm not a native English speaker. I'm sorry if I didn't explain the problem clearly. I'm using Windows 10 Enterprise Insider Preview (I'll use Win10 instead below). Until yesterday, I'm using Win10 build 11102, and Git for Windows works well. But today I upgraded my system to Win10 build 14251, then something wrong happened. I opened a "cmd" in my repository and entered "git pull", then a dialog window appeared, saying "Git for Windows has stopped working". The version of the git on my system was 2.6.4, and I found out that the latest version was 2.7.0.2. So I downloaded a installer from "https://git-scm.com/". I opened the installer, but as soon as the installation finished, the same error dialog appeared. I closed the dialog, but it appeared again, so I closed it again. I opened a "cmd" and entered "git", of course, it crashes and the error dialog appeared. By the way, I installed GitHub for Windows on my system and it crashes too when I pressed the "Sync" button in it. In my surprise, GitHub Extension for Visual Studio works correctly.