Installation Stalls at "Detecting Installed IIS"

I try to install but once it gets to Installation Status window it freezes at Detecting Installed IIS. What do I do to get past this wonderful step? And who tested this installation process? Better yet, who let it be releases with so many bugs?

do you have Norton/Symantec antivirus software running on your machine? If so, temporarily disable it and rerun setup.

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Thank youl. I finally had success.

Seems like turning it off (Symantec Antivirus) was not a guarantee for success -- I did turn it off before with no success; uninstalling all might have helped too where I then installed it fresh.