Window defender is a built-in anti-virus in Windows. It can easily scan your computer files and find out the viruses and malicious files.
This quick guide will show you, how to turn on/off window defender. Let's see,
Go to start menu and search windows defender.
Windows defender window will be appeared then go to Tools > from upper option and then click on Options.
Now choose Administrator from side options then check or uncheck use this program option then finally click on Save button.