When I click on Google links, an empty page loads and then another window is hijacked to open the link. Why?

restart computer and tap the F8 key, use arrow and enter key to select safe mode with networking, then get free version of this and update, then do full scan. a href="http://www.malwarebytes.org/mbam.php" rel="nofollow"http://www.malwarebytes.org/mbam.php/a