If you refer to the ASPCA toolbar, you can remove it by accessing your browser's add-ons section. For Mozilla Firefox, open your browser, go to Tools, Add-ons, Extensions and search for the toolbar and hit Uninstall/Remove. For Internet Explorer, open the browser, hit Tools, Manage Add-ons, look after the toolbar and click on the Enable button. In both cases, you will have to restart your browser, in order to see the results.