Windows defender is a very dynamic program in Windows 10. The program is responsible for the scanning and finding out of the infections to remove them at time. You don’t need to install any third party tool in Windows if you are using Windows defender program. However, it also gives you some error issues sometimes while you run it in the computer. Windows defender error 0x80072Efe is also one of them. After the occurring of this issue, you will not be able to scan the system. You can fix this issue very easily using some manual or automatic error fixing methods recommended here. For automatic fixing, you must download and install Advanced System Repair Tool.