CenoPDF installation file includes Microsoft .NET Framework. If the installer detects your computer does not have Microsoft .NET Framework, it will install it automatically for you.
You also need Microsoft Office and its latest service pack installed. You can visit Microsoft Office Download Page to install the necessary service pack.
You can always download the latest version of CenoPDF from http://www.lystech.com/download-pdf-form-tool.aspx . The installation file is CenoPDFInstall.exe. Run this file and follow the instructions to complete the installation.
General troubleshooting steps