I have read that windows 8 retail can be activated online only a limited number of times. After that we have to go through cumbersome phone activation. Is there any way to backup activation files ?
Backup the "store" folder
note: the folder may be hidden, you would need to unhide hidden folders in Folder Options.
1 file named data.dat which is hidden
1 file named tokens.dat which is visible
1 folder named cache containing a file named cache.dat
to uninstall the key so the status changes to Unlicensed
to stop the Software Protection Platform service (sometimes you can get a message that it's already stopped and not running)
in Command Prompt you'll see that it worked and you're activated and by using the Volume Activation Management Tool 2.0 you'll see License Status: License renewed and Genuine Status: Genuine.