I'm trying to reinstall Hearts of Iron 2 on system using Vista. Had it on there once before but disk shattered in drive. Bought new disk and prepared to install it again. Pops up asking for cancel or allow unknown program to run. I click allow. Install menu comes up with install, unistall, play and exit. Click on install and new menu asking to repair or reinstall or remove comes up. Clicking on either choice acts like it installs but never does. Then pops up finish screen. Click on finish and menu comes up saying reinstall using recomended settings or program installed correctly. I go to regedit and remove any old files the has to do with Paradox or HOI 2. Am I missing a step or something?