For the installation, you need elevated administrator privileges. This didn't use to be the case—all installers got such privileges automatically—but Microsoft tightened up security significantly and now it seems only their own style of Installer (msi files) are automatically treated correctly..
Place the "Install FSUIPC4.exe" program onto your desktop, or into a temporary folder, and right click on it, selecting "run as ... Administrator". This method allows it to run with sufficient privilege
Hi Peter, These are the instructions that I went by to try and install the Program. I eventually just double click the Installer and everything went fine from there. I certainly am no computer guru, but I did try to follow your directions!!!! Eddie