- Zammillo
- Zbavanent.info pop-ups
- Zberp Trojan
- Zebar Ads
- ZenSearch.com
- ZeroCrypt Ransomware
- Zeta Ransomware
- ZeuS.Zbot.aoaq
- Zimbra Ransomware
- Zingload.com
- Zip Arcade Ads
- Zip enhancer
- ZipperPro
- Zombie Alert
- Zombie Invasion
- Zombie News ads
- ZoneTrek Ads
- Zoo Toolbar
- ZoomCheck Ads
- ZoomIt app
- Zorton Multirogue 2014
- Zorton Vista Protection 2014
- Zorton XP Protection 2014
- Zquirrel.com
- Zquirrel.com virus