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RE: Error 80072efd
disable all proxy and security settings.
after you sign in successefully u can enable them again.
ANtivirus, personal firewall, windows firewall, Proxy client (such as ISA)
disable them all. or you can try troubleshoting by urself trying to disabling them one by one coz all these may cause you these errors.
If you have NOD32 antivirus just disable the personal firewall, antivirus temporaly
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