I am visiting my mother for christmas break, and she let me use her gateway laptop. The only virus protection she had was Norton, which she never registered, and hadn't updated since 2003. When I was browsing today, I apparently downloaded a trojan that has to do with the program SpywareStrike. An icon that looks like the windows updater icon down by the clock is flashing red and has a little pop up window with the following message: "System Instrusion Detected! Dangerous infection was detected on your PC. The system will now download and install most efficient antimalware program to prevent data loss and your private information theft. Click here to protect your computer from the biggest malware threats."
This is obviously some kind of trojan, from the poor spelling and sentence structure. But, I ran through all the tips on your "so you think you have malware" page, and nothing can get rid of this pop up message and icon. If I click the X in the popup window, it just reappears a few seconds later, and if I do nothing, something automatically installs SpywareStrike and places an icon on the desktop.
I already tried Trojanhunter, Spybot seek and destroy, adaware, and all the other downloadable programs on your site, please help.