Windows Defender is already installed in Win8.
http://www.microsoft.com/security/pc.../windows8.aspx
As I stated before, Defender is already built-in. You don't need to download it.

Norton Internet Security (NIS) is kind of a resource hog. You can use the removal tool to get rid of it.
https://support.norton.com/sp/en/us/...home&version=1

Good luck with the restore.