Unable to activate Acrobat Profession v2020 Perpetual

[Alfred22725286h61y]

I have three or four perpetual Acrobat including 2020(in serial number) registered to my Adobe ID, installed using the package downloaded from account.adobe.com

But problem is it prompts me to sign-in and input serial number on ever launch.

I checked the log, it says the product is not activated. 

I've done troubleshooting steps in these pages:
https://helpx.adobe.com/download-install/kb/acrobat-repeatedly-prompts-for-sign-in.html
https://helpx.adobe.com/manage-account/kb/troubleshoot-creative-cloud-sign-out-sign-in.html

I've checked the network and I have used cleaner tool and reinstalled.

Please advise how I should proceed.

[default6djyprzswwlb]

Yo tuve el mismo problema con adobe acrobat dc pro version 2015. 

sal actualizar al windows11. lo solucione con  la actualizacion    Acrobat2015Upd1500630527.msp . Se instala sobre la que ya tienesy ya te deja activar la cuenta, por probar no se pierde nada. El archivo esta en la Comunidad