Search.tb.ask.com or hp.tb.ask.com is unwanted search engine by Mindspark Interactive, that is often used in toolbars designed by this company. Can be also promoted separately. It can infect Google Chrome, Mozilla Firefox and Internet Explorer. Search queries are redirected to int.search.tb.ask.com, which is Ask.com search engine result page. Ask.com is legitimate search engine, but results it delivers can be filled with sponsored links and extra advertising. Distribution methods are doubtful, and Mindspark Toolbars are classified as browser hijackers and potentilly unwanted programs.