+ 0 Votes Are they portable versions of the apps? seanferd 5 years ago Those don't install, you just click on them to run. If you double click on an installer file, it should install. It should have absolutely no connection to previously installed software, whether or not that software has been uninstalled. If there is nothing installed (check the Program Files directory), nothing will run, unless the file you are clicking on is a portable (self-contained) app.