I am recieving the Error 1603 when installing Architecture 2013. I have done the following things to try and solve the issue.
First I uninstalled and reinstalled all of the VCREDIST (Microsoft Visual C++) packages.
Next I tried and uninstalled the AutoCad 2013 SP 1.1.
UAC is turn off.
AV is turn off
I am attaching the error log file
Architecture will not install if AutoCAD 2013 is already installed from another suite. They both try to install into the AutoCAD 2013 folder. If that folder exists, delete it and it will install. You do not need vanilla AutoCAD if you are also installing a vertical product like Architecture or Mechanical because it also includes Vanilla.
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To solve my issue I have to start from scratch and reinstall everything minus all service packs for all products.