Internet security essentials alerted me to a virus attack on my computer. I tried to install Security Essentials, Adv something or other, but I can't. I keep getting an error message that the server is unavailable & an error code:ox80070643. Can you help me?

Hi tcudnoc, ·Do you have any other anti-virus installed on the computer? Follow the steps suggested by Hazr from the below link: Installation Error 0x80070643:http://social.answers.microsoft.com/Forums/en-US/msestart/thread/908fad3e-f9fc-4d8a-be83-ae7d3bc48db5 Regards:Samhrutha G S - Microsoft Support.Visit our Microsoft Answers Feedback Forum and let us know what you think.