Autodesk Inventor 2013 installation stops saying PLACEHOLDER

Hello Whiz,
I got this error when I am in the middle of Autodesk Inventor 2013 installation. Don’t understand why I am getting this error, when I googled found that Avast Anti-Virus software may be the root cause. Do I need to remove this anti-virus? Is there any other option to go further without uninstalling antivirus? Help Please.
Title: Inventor 2013/2014 + Avast Anti-Virus Software + Red X PLACEHOLDER

PLACEHOLDER
