During ther P8 installation, what option did you use to install the Runtime??

Seems like a typical Windows 7 case....

Search the forum, a lot of info , also on the item installations you tried afterwards...

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!