I have purchased a new pc from a vendor. I have purchased a licensed version of the Avira AntiVir antivirus software along with the pc. Suddenly after few days my computer was infected with the virus because Windows XP Total Security 2011. After removing the virus as I restarted the pc, a message a came up stating that the license key is invalid, because of that most of the protection has been turned off and my PC is vulnerable to all types of threats.
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