You can get the latest version of PAF 5.1 for windows at http://www.familysearch.org/http://www.familysearch.org/ Then click on 'Order/download products' Then click on 'software downloads - free' Then click on 'Personal Ancestral File 5.1 - Multi Language (9.7 MB minimum)' Then click on the 'proceed' button after reading Scroll to the bottom and 'click on continue' Then just fill in the information and send. It should start to download to a file on your computer. Write down the file location to find it later. PAF is a very easy to use program. Not as powerful as the larger ones. But still a good family tree program. I use 6 different tree programs in sharing files. Paf is my second choice. Hope this help you out.