Windows operating system is a very popular and very easy to use OS in the world. It has released so many version of its Windows OS in which Windows 10 is the latest one. In Windows 10, the Microsoft has given an inbuilt antivirus or security program named Windows defender that plays a very important role in scanning the computer and keeping it secure from external threats like virus, malware, junk files and so on. Sometimes when you try to launch the program in the Windows computer, you get Windows defender error 0x80508002. It is a very critical error issue that should be fixed as soon as possible. You get the defender error code 0x80508002 mainly due to missing or deletion of some important system files associated with Windows defender program. You should fix this error issue to make the computer secure from any invasion of virus and other malicious attack. You can use some manual or automatic error fixing methods or you can also use Advanced System Repair Tool for automatic fixing.