Backup Office 2013 License -

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\OfficeSoftwareProtectionPlatform Export this key (contains encrypted product key):

C:\ProgramData\Microsoft\OfficeSoftwareProtectionPlatform\tokens.dat Also back up this registry key (optional but safe): backup office 2013 license

net stop osppsvc Copy the following folder to a USB or secure backup: backup office 2013 license