Windows defender program is a very amazing feature that you get in the Windows 10 operating system version. You usually run this program to scan the computer for virus extraction and removal of the infectious or corrupt files. You can also run some antivirus instead of it in the computer. Sometimes it happens that when you run this program in the computer, you get Windows defender error 0x80501004 on the screen. The defender error code 0x80501004 comes to your computer due to internet disconnection or due to improper maintenance of the system. After getting the error issue, you need to fix the issue as soon as possible; otherwise it may harm the computer data very much. Therefore, you can go through the manual or automatic error fixing method for this purpose. You can use Advanced System Repair tool for automatic fixing of the issue.