And if I have a crash to windows ( or hard disk)? What to do in this case?
Reinstalling Windows requires reactivation but, it's not certain if will count as a new activation, I guess it's different if you just reformat your old hard drive or you buy a new one.
Crashes are one reason we provide 6 activations to begin with. On an ideal world with no crashes or hardware failures, we could give just 1 activation, because with the deactivate feature it should be enough for 1 user, maybe 2 for a 2nd PC, and that's it.
And of course, those 6 activations are not for the life of the product, don't forget that, if more than 90 days passed since the last time you have been granted an activation, you'll be automatically reactivated anyway even if you used all the 6 activations, because the oldest one will be reclaimed without the need to deactivate yourself.
And, of course, you can always contact us asking for a manual reactivation, even if you consumed all your 6 and even if less than 90 days have passed from the last activation.
It's really not possible being in a situation you can't use the product with our method, users mistakenly think it's "complex", but only because it has a lot of backup and safety features built in.