i suggest you always visit your task manager if there are unwanted programs or suspicious applications that are running on your PC. If you found something that is suspicious search that program or application if it is a malware or any virus.
I've read about key scramblers do they really work? Any other software you guys can suggest...I already use malwarebytes as I heard great things.
Use a service like LastPass. Then you can "click" your password with a mouse instead of typing it in on a keyboard.
this is right! my online banking uses this system to prevent 3rd party softwares to detect your password through typing in the keyboard