In the Windows operating system based computer, you may get many error issues. Some errors are easy to remove but some are very much critical and you cannot fix the issue easily. When you launch the Windows defender program in the Windows 10 OS, you get Windows defender error 193:0xc1. Actually the defender program is designed to scan the computer and to remove errors completely. It is a very important feature of the Windows 10 operating system. But problem is the error that you get. Defender error code 193:0xc1 may come to you due to the missing or corruption of the system files associated with Windows defender program. You should fix the issue using manual or automatic error fixing methods. You can also download Advanced System Repair Tool for automatic fixing of the error.