Hi Welcome to JustAnswer
Do you have firewall ?
That's good and do you have router's password ***** well ?
But do you have password ***** it ?
Can anyone use your internet without password ?
Yes. you can get a router that will be useful for you to connect wireless.
Secure remote was an automatic popup .Please ignore it
Did you get password ***** internet from your ISP if not you can set it by contacting them.