Don't know if it matters, or will help, but I have Poser 6, Pro 2010, Pro 2012, and 2014 all installed top level under the C: drive. All the runtimes are installed traditionally (under their respective Poser directories) with file search set for "Deep". V4 is installed under both P6 and PP2012. UAC is disabled. Win 7 64

All of it operates seamlessly across all runtimes.