Why does my computer automatically redirect when i type something in and when i click on a link from google?

If you are using google chrome, you have to uninstall add ons or extensions . To do this click on "customize and control google chrome" (settings) symbol located on top-right side of chrome browser, put mouse pointer on "tools" menu, click on "Extensions" and then uninstall the extensions/addons where your browser redirect. Restart your browser. It may solve your problem.