random pages appearing

Adware is installed without your knowledge, removing it will help.

1. Use free Malwarebytes Anti-Malware for Mac/ AdwareMedic to remove adware

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

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

Once done, quit Malwarebytes Anti-Malware.

or

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

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

2. Disable Extensions and test.

Safari > Preferences > Extensions

Select and dissable all extensions and test.

Enable Extensions one by one and test.

To uninstall any extension, select it and click the “Uninstall” button.

3. Safari > Preferences > Search > Search Engine :

Select your preferred search engine.

4. Safari > Preferences > General > Homepage:

Set your Homepage.

Hi Simon:

You have not supplied the information about what model / year of Macbook pro you are using.

When you say random pages are poping up what exactly are you referring to. Are you talking about adware?

Download and post an EtreCheck report http://etrecheck.com/ and maybe that will give some additional information.

Kim