Estas instruções são tiradas de este artigo MyDigititalLife.info para" Como fazer backup e restaurar o status de ativação do Windows 7 e Server 2008 R2 (Ativar offline ao reinstalar) ". Deve dar-lhe os passos básicos que você precisará realizar ao alternar entre os dois, você poderá automatizar isso de alguma forma com alguns scripts básicos.
1. Copy and save or backup the following activation-related files to external storage medium such as USB flash drive or portable hard disk drive:
%SystemDrive%\Windows\ServiceProfiles\NetWorkService\AppData\Roaming\Microsoft\SoftwarePlatform\Tokens.dat
and,
%SystemDrive%\Windows\System32\spp\tokens\pkeyconfig\pkeyconfig.xrm-ms
Note: For 64-bit (x64) OS,
%SystemDrive%\Windows\SysWOW64\spp\tokens\pkeyconfig\pkeyconfig.xrm-ms
have to be backed up too.2. Retrieve and record the product key used to install and activate the current Windows 7 or Windows Server 2008 R2.
Tip: If you can’t remember the product key used, there is plenty of product key viewers available to help.
3. Reinstall Windows 7 or Windows Server 2008 R2. When installation wizard prompts for a product key for activation, leave it blank (do not enter anything).
4. In the newly installed Windows operating system, stop the Software Protection Service in Services.msc or with the following command (run in elevated command prompt):
net stop sppsvc
5. Navigate to the following folder:
%SystemDrive%\Windows\System32\spp\tokens\pkeyconfig\
Note: In 64-bit (x64) operating system, also perform the action in
%SystemDrive%\Windows\SysWOW64\spp\tokens\pkeyconfig\
folder.6. Take ownership and give user full control permissions (alternatively add grant full control right click menu item) to pkeyconfig.xrm-ms file.
7. Delete the original default pkeyconfig.xrm-ms file, and replace with the backup copy.
8. Navigate to the following folder:
%SystemDrive%\Windows\ServiceProfiles\NetWorkService\AppData\Roaming\Microsoft\SoftwarePlatform\
9. Take ownership and give user full control permissions (alternatively add grant full control right click menu item) to tokens.dat file.
10. Delete the original default tokens.dat file, and replace with the backup copy.
11. Restart the Software Protection Service in Services.msc or with the following command (run in elevated command prompt):
net start sppsvc
12. Register the product key for Windows 7 or Windows Server 2008 R2 with the following command (run in elevated command prompt):
slmgr.vbs -ipk xxxxx-xxxxx-xxxxx-xxxxx-xxxxx
Replace xxxxx-xxxxx-xxxxx-xxxxx-xxxxx with the actual product key.
13. Windows will activated instantly, off-line. To check activation status, uses of of the following commands:
slmgr.vbs -dlv
slmgr.vbs -dli
slmgr.vbs -ato