add ins keep popping up in my hotmail account when opened?

I assume you have adware. Follow the instructions on this web page in order to manually remove adware from your mac: https://support.apple.com/en-us/HT203987

You may also find adware removal guide on this page http://www.thesafemac.com/arg-identification/

If you do not want to remove adware manually use this anti malware tool in order to scan and remove it: https://www.malwarebytes.org/antimalware/mac/?utm_source=blog&utm_medium=social

Download, open dmg file , and run it by clicking “Scan for Adware” button to remove adware.

Once done, quit the application and restart your mac.

Install adblock for your browser: https://adblockplus.org/

First, never use any kind of "anti-virus" or "anti-malware" software on a Mac. That's how you create problems, not how you solve them.

If you're only seeing the ads on that website, it may be the normal content. "Hotmail" is ad-supported.