Windows defender program is a set of antivirus in the Windows computer. The defender program or antivirus is very much compatible with Windows 10 version of the operating system. Sometimes it happens that when you try to run the Windows defender program in the computer, it doesn’t get started and gives you Windows defender error 0x805080211. It is really a very critical error issue that comes to the PC with various symptoms. Though it is not found exact reasons or causes for the occurring of the defender error 0x805080211 in Windows, but it sometimes comes due to deletion of some important files associated with this program. You can fix Windows error code 0x805080211 with the help of the error troubleshooting procedures given here. You can also install Advanced System Repair tool in the computer for automatic fixing of the error.