I Checked that I had flash 10, explorer 7 (even though I only normally use it for windows updates). My machine is not a powerful machine, but it is quite a bit more than the minimum requirements for poser.

I unzipped the installers and the content, placed the unzipped content into the content folder. I also tried it without the content. I Uninstalled and reinstalled, reinstalled over an install. I tried to install over night and during the day. I do not like to install. I do not like it anyway.