I am having a lot of trouble with my computer. The windows XP tray (on the lower-right) repeatedly says that there is a virus found and that there is an infection found on my computer(its the icon with earth symbol on it keeps blinking to a red x). However, when i click on it, it takes me to a anitvirus website-"contraviruspro.com"- and when i try to run it, it says i need to purchase it in order to do a full system scan. Further, i also get messages from the widows XP yellow triangle, saying that there are spywares found on my computer. I have run and scaned succesfully using Norton-Antivirus, Norton have found spyware/viruses on my computer and i have remvoved them yet the windows xp sign keeps coming up.