Hi Mr Raptor

Did you untick the Windows folder option "Hide known file extensions"? And did you delete the extra extension (e.g. .txt) on the Poser.exe file? (See nruddock's second post, first paragraph).

This is the usual reason. Or not installing into the same Runtime as your V4.2. The folder you choose in the installation program must be the parent folder of the Runtime you are installing into.

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)