Advanced-Tokens-Manager

Normally, you can use Windows 7 serial key during installation on the same machine for activating Windows but online activation have some limits. If you install Windows on your system many times due to reasons like virus threats, system files corruption, etc. then online activation is a great problem. 7Tokens Manager is a freeware tool which will back up the Windows 7 Retail, OEM and MAK licenses (your genuine license) and then restore it.

Features:

    Backup’s RETAIL / OEM / MAK licenses
    Backup Certificate / Serial / Tokens.dat
    Backup license files
    Dynamic interface
    Very lightweight and fast
    Programmed with security features
    5 min is estimated time required to restore your activation

   http://forums.mydigitallife.info/threads/27341-Advanced-Tokens-Manager-The-Activation-Backup-Solution