Hi Friends: I have my PC with Windows 8 with Media Center 64bit, Kaspersky Internet Security 2013, Office 2013 Plus, Visio 2013 and Project 2013...Activation Backup and Restore with Advanced Tokens Manager v3.5 RC 4...works fine for my needs. I'm thinking to change the OS to Windows 8.1 with Media Center but I see the following: - The installation for Windows 8.1 with Media Center 64bit is easy with my Retail Key and my Promotional Key - The installation of Office 2013 Plus, Visio 2013 and Project 2013 is too easy with my Retail Keys - I can be done the Activation Backup with Windows Toolkit 2.4.9 - For the moment, I can install Bitdefender Total Security 2014 or AVG Internet Security 2014 64bit...Kaspersky Internet Security 2014 is not compatible Questions: 1. What are your experiences to Re-install Windows 8.1 with Media Center 64bit, Office 2013 Plus, Visio 2013 and Project 2013 and Activation Restore with Windows Toolkit 2.4.9? 2. What are your experiences with Bitdefender Total Security 2014 or AVG Internet Security 2014 64bit? 3. What are you recommendation in general? Thanks in Advanced for your replies TecMan