OPA-Backup creates a backup of the Microsoft Office product activation. So just play after reinstalling the activation file back in and saves reactivation. In the activation of MS Office office suite stores the necessary data in a file and the Windows Registry. Now to install Office new, so is actually a new activation required. OPA-Backup saves this reactivation by securing the necessary data and records and which records when needed with one click. However, this requires a one-time official and correctly activated Office. It supports Office XP to 2013. The reasons that argue against re-activation of Office are individual. The freeware OPA-Backup backs up all the data and is simple to use. To run OPA backup the installation of Microsoft .NET Framework Framework version 3.0 is the way required.