I had just give a try at Hotspot shield but after some time i want to uninstall . eve after uninstalling my browsers search engines were messup and i could change it but when i closed the browser and open agine it had the same problem...
Finally i fix it by using this free software...called "adwcleaner"
http://www.bleepingcomputer.com/download/adwcleaner/
hope this will help all the people having the same problem......