Microsoft Anti-Spyware expired on 31st December. You may still be trying to install that version. I would download it again and see what happens. The latest version expires on 31st July.
I don't know anything about PrivacyKeeper, sorry.
What is ransomware and how do I protect my PC from Petya?
Microsoft Surface Studio – the artist's hands-on review
Original iPhone review
Comment mettre à jour Kodi ?