I have bought a adobe acrobat XI pro licence some years ago, used it on my old notebook since one week, deinstalled it and ...

Hi PierreDiel,

Thank you for reaching out, and sorry for the trouble caused.

I would like to inform you that Acrobat XI is an older version that is no longer supported. It may or may not function correctly with the latest operating system versions. For more information, refer to the following help document: End of support for Adobe Acrobat XI and Reader XI

Could you please provide the complete error message you receive when trying to activate Acrobat XI on your new machine? A screenshot of the error message would also be very helpful.

Please let us know if you need any further assistance.

Thanks,

Meenakshi