Fro about the last month, my computer has been operating at a snail's pace. Just to open my email can take up to fifteen minutes and when I ran Norton antivirus, it still wasn't done after more than 36 hours! When I shut down my computer, I often get a notice that a program called SUNKIST.NOTIFYICONDATA.hWnd is not responding. When I Googled it, I found out this is a hijack program. What is a hijack program, and how do I get rid of it and restore my computer to its moderately speedy pace?