Update README.md

README.md

@@ -44,6 +44,9 @@ https://github.com/hellzerg/optimizer/releases
 ## Screenshots: ##
 https://github.com/hellzerg/optimizer/blob/master/IMAGES.md
 
+## How to effectively disable Defender in Windows 10 1903 and later (https://docs.microsoft.com/en-us/windows-hardware/customize/desktop/unattend/security-malware-windows-defender-disableantispyware) ##
+Restart in SAFE-MODE and run Optimizer with "/disabledefender" switch
+
 ## Silent configuration files: ##
 https://github.com/hellzerg/optimizer/blob/master/CONFS.md