Since last night, my home page has been changed and automatically directed to Google. I use Yahoo as a home page. I tried to change the home page under the Tool and Option. But it keeps bringing Google page shortly after the "http://flyingincognitosleep.com/cgi-bin/h.pl" shows up. I use Antivirus software all the time but it did not pick up any virus. I also ran the scan. But it did not pick up any virus.

How do I get rid of this virus?

Is this virus serious enough that I should not do online shopping anymore?

Does anyone have suggestion? Thank you.