I recently downloaded a video that came w/a codecs.exe file to play said video. After I double clicked on the file, it extracted the files and then restarted my computer. However, after booting up, I keep getting a pop up in my system tray saying that no firewall is turned on and despite enabling it over and over, it keeps turning off w/the same pop up bubble. Also, when looking @ my norton antivirus, the auto protect is off and the "enable" button does not respond. Also, the email scanning option of norton has "error" next to it. Did I download a virus? Please help.