Re: When I Open the Acrobat XI I just purchased as download from Academic Superstore I get and error message that the serial number is invalid.

Hi memegaines,

Are you still facing this issue?

Send me the serial number you are using via private message option: https://forums.adobe.com/thread/1184148

Also attach the screen shot of the error message, you must remove serial number from screen shot while you reply.

Regards,

Ajlan Huda.