In the Windows computer, you get so many error issues time to time. These error issues are the result of some improper activities or some unnecessary or corrupt components. In the Windows 10 update of Windows, you may see a very fascinating program named Windows defender. This component may help you to scan the computer and to remove virus efficiently without using any third party antivirus tool. But sometimes when you run or launch it in the computer, you get Windows defender error 0x80501108 on the screen and scanning process gets stopped. The situation comes to you usually due to deletion of some important system files associated with Windows defender program. So, you need to get rid of the issue using some manual or automatic error fixing methods. You can also download and install Advanced System Repair tool for automatic fixing of the issue.