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Thank you very much. I use Trend micro Worry free for Business

I 've Formatted an Hard disc of a PC with Windows '7 SP 1  in wich there was installed Trend Micro antivirus . After formatting i try to re-install Trend Micro Antivirus (with Autopcc.exe and AutopccP.exe  ) but installation is uncesssfully and appears an error about Windows installer. before formatting disc...Trend micro was ok..with the same version of  Trend micro Antivirus Agent. after formatting is impossible to install Trend micro Agent on the pc. Somebody can help me ? Thank you in advance