AVIToolbox itself is a harmless app that some folks might find useful, but I'm trying to remember the last time I ran a setup routine where I had to cancel or decline so many add-ons. Worse, while I clearly said no to all those things, I still got a Lot of new registry entries for one of those add-ons in the [HKEY_CURRENT_USER\Software\PowerPack] registry key.
In win7
The installation performed the following activity:
105 files added
70 files deleted
33 files updated
2298 registry entries added
14 registry entries deleted
69 registry entries updated
Installed 6/24/2013 12:10:01 PM