Are you getting persistent and intrusive pop-ups from Havenotifyfriends.info? If you are, then your computer is infected with an adware. Havenotifyfriends.info will try to trick users into subscribing into its push notifications. Once you do, the adware will attempt to commandeer your browser search and homepage.
Havenotifyfriends.info will send you to malicious websites to get money from you or infect your computer further. It may also prevent you from changing your settings back. It is usually installed through bundled software without you knowing. It is best that this adware be removed immediately.