What Windows version are you using?
If using Windows 8, I recommend to keep Windows Defender and use Windows Firewall. Have UAC set on default and learn how to use it properly.
Once you learn how to use UAC effectively then you will not need to add a bunch of security products that will make your Laptop slow.
Never download files from unknown sources or visit unknown sites. You a secure web browser like Firefox or Google Chrome and some extension to help keep you away from the bad websites like WOT, LastPass, Adblock Plus, etc.
Enjoy!!