I removed Windows Defender from the very first and also all the trial programs that come installed.
Hint:
If you type %temp% in the Run window every temp file you DO NO need comes up. Click Select All and then Delete. You can free up gigs of space. If you take your computer in for fixing problems and then when home run the %temp% and it's full, you had a lousy tech.
Never buy a program to clear up problems. Most techs will use the free programs or Goggles how to fix the problem. They can't keep up with all the new problems so wipe the computer and reset like new. Google your problem before taking it in for a repair. You may be amazed at how easy it is to fix.