Before we go further on fixing gaming issues and learn why an specific game is not working, please disable Windows built-in virus scanner. In Windows 10, it is also known as Windows Defender (Also in Windows 8 and 8.1). However, if you are using Windows 7 (Windows Security Essentials).
Steps to disable Windows Defender in Windows 10:
Follow the steps below:
Step #1: Press Windows key, search for “virus & threat protection“:
Step #2: Go to Virus & threat protection settings on the new pop-up window that opens.
Step #3: Turn off the Real-time protection, which will disable the Windows 10 default antivirus security
That’s how we can easily disable Windows Defender in Windows 10.