If you bought the UPGRADE version instead of the FULL version you may not install without a previous program's serial number
Thank you John for you help. So I need to return this upgrade one and get the full version or I can get a original serial number anyhow?
>can get a original serial number anyhow
I don't know any way to do that... return the upgrade version and buy the full version is the only way I know
Yep. I'm going to do that! Once again thank you so much for your help!