Windows defender is one of the best features in Windows 10 operating system. With the help of this program, you can scan the whole computer and remove the infections or corrupt files very easily. But sometimes when you launch the Windows defender program in your computer, you get Windows defender error 7023 on the system screen. The defender error code 7023 is a very critical error issue. You cannot be able to scan the computer while you get the issue. In this situation, you must apply the manual or automatic error fixing methods recommended here in this article. For automatic fixing, you can download and install Advanced System Repair Tool.