In the various version of Windows operating system, you get so many services and features. In Windows 10, you are provided a very amazing feature called Windows defender program. The program is very amazing that works as an antivirus in the Windows by dint of which you can scan the computer very easily. However, when you run or launch the program in the Windows, you get Windows defender error 0x80501001. After getting this issue you cannot be able to access the computer properly. The computer programs will get crashed and everything becomes inaccessible. You should fix defender error code 0x80501001 in Windows very soon by using the methods given below. You can also download and install Advanced System Repair tool in the Windows to fix the issue automatically.