I had a similar problem. I got emails stating that the emails i sent were refused. These emails that I hadn't sent were going to websites that I had visited. I started a thread about it here, and was told that I probably had a virus. I took the computer to a repair place and they cleaned it out. I actually had quite a few visuses. They also put in a Norton virus protector, which updates itself automatically, and is much better than the McAfee virus shield that came with the computer. It cost 110 Dollars, but it was well worth the money.