I received this message when trying to install 2012 autocad.
CRC failed in 3rd party\NET\4\wcu\dot NET Framework\dotNetFx40_Full_x86_x64.exe
screen shot attached
This looks like a corrupted installer, at the stage it gives that error, the installer is in the process of extracting ACAD 2012 installation content, so no actual installation is happening. Try re-downloading the installer and please disable your antivirus during the download.
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