Windows operating system gives you so many applications or programs that you must use to complete the technical tasks. Windows defender program is the best program that you get in the Windows computer. You use this program to scan the whole computer to find out the virus infections. But sometimes it happens that when you launch the Windows defender in your computer, you get Windows defender error 0x80501000. Main reasons for the occurring of the defender error code 0x80501000 are problem with this program or due to deletion of some important files associated with Windows defender. After the occurring of this issue, you cannot be able to scan the computer. In this situation, you must go through the manual or automatic error fixing methods recommended here. You can download a third party automatic Advanced System Repair tool for automatic fixing of the issue.