Pop up ads while in safari on the iMac

Please review the options below to determine which method is best to remove the Adware installed on your computer.

The Easy, safe, effective method:

http://www.adwaremedic.com/index.php

If you are comfortable doing manual file removals use the somewhat more difficult method:

http://support.apple.com/en-us/HT203987

Also read the articles below to be more prepared for the next time there is an issue on your computer.

https://discussions.apple.com/docs/DOC-7471

https://discussions.apple.com/docs/DOC-8071

http://www.thesafemac.com/tech-support-scam-pop-ups/

You are quite welcome