Although you can use the Windows 7 license key for multiple installations on the same machine or installation after formatting, there is a limit to the number of online activations. This is indeed a issue for people who frequently format their machines. Although they can use the phone activation, it is a painful task. 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
- > 5min is estimated to restore your activation
Under Win7 Enterprise doesn’t read S/N – maybe Microsoft’s protection?