i need to remove http://search-quick.com

This link will help you

Remove unwanted adware that displays pop-up ads and graphics on your Mac - Apple Support

just click that blue text

1. Use free AdwareMedic to remove adware

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

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

Once done, quit AdwareMedic.

or

Remove the adware manually by following the “HowTo” from Apple.

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

2. Safari > Preferences > Extensions

Turn those off and relaunch Safari.

Turn those on one by one and test.