It says daz install, so wondering if as stated above if it is a ds file, should be installing to the poser subdirectory. Also if you are trying to install and your poser dir is in the 64bit that could be the problem as I notice it's trying to install into the x86. At any rate check again to make sure it isn't a ds unless you are specifically putting it there in the daz directory. I created a small txt file and stuck it in the directory and renamed it poser.exe, that solved my V4 install problem.