Windows defender program is one of the amazing programs in the Windows I have ever seen. It is launched with the new update of Windows 10 operating system. The Windows defender program scans the whole computer after you launch it in the computer and remove the infections it finds. But sometimes it is seen that when you run the Windows defender program, it gets stopped and gives you Windows defender error 5 in the computer. Occurring of the defender error code 5 in the computer is a very critical error and you should fix it as soon as possible. You may get the error due to the missing or corruption of the system files associated with this program. You should apply the manual or automatic error fixing methods recommended here in the article. For automatic fixing, you can also download and install Advanced System Repair Tool in the computer.