While you operate the computer or while you work with any application in the computer, you face some error situations also time to time. Different errors have different reasons and symptoms. There are also some services and features that get you into unpredictable situations. In Windows 10 OS, you get Windows defender program that is used to scan the whole computer to remove virus and other infections. But you also get Windows defender error 1920 sometimes if the program doesn’t work properly. Defender error code 1920 comes to you due to corruption of the system files associated with Windows defender program. In this situation, you must go through some manual or automatic error fixing methods. You can also install Advanced System Repair Tool in the computer for automatic fixing of the issue.