My laptop has been upgraded to windows 8 ultimate operating system for a while. It has been playing its own role quite well. But last evening, when I tried to change the homepage. It shocked me a lot, I can not change it. You know that after the installation, my brother set a homepage which I don't like. So I long for changing it. But I can not change it to Google. Is my computer attacked by viruses? I 'v tried to remove them, but there are no viruses found. Why can't I set it?
Pls show me some advices!
Thank you a lot!