I March 26 this year to buy Parallels Desktop 8 permanent activation key, restart the computer today, after re-entering the PD, prompted me to try key expires, enter the activation code before purchasing tips invalid, how can I do?
If you bought a valid PD8 key then you can enter that and all will be fine. If you bought a PD9 key then you have to upgrade to 9 then enter your key. You can always, if bought from Parallels log onto the site with your info and check your licenses out.
