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-24:Activation Error

Christine Lawrence

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Christine Lawrence


I upgraded to a new computer and successfully deactivated Nitro on old computer but cannot activate Nitro on new one.  Please let me know what you need me to provide you to assist me.  I get the -24:Activation Error and had my IT Support Team follow the manual steps with no luck.  My email address is christine@pipedreaxxxxxxxxx.com.


Thank you,

Edited by AllainU
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  • Official Nitronaut

Hello @Christine Lawrence,

Thank you for reaching out to us through our Community Forums!

As a courtesy of being a valuable customer of Nitro, we want to make you aware of the change to your product that may affect its activation performance (e.g. -20: Error - Invalid license number or -24 Error: Activation Error). 

To continue offering our customers the very best PDF tools, we have upgraded our servers and has shutdown the one your older version of Nitro Pro runs on so please update to Nitro Pro using below direct MSI links:

x32 http://install.nitropdf.com/professional_12169574/en/retail/nitro_pro12_ba_x86.msi 
x64 http://install.nitropdf.com/professional_12169574/en/retail/nitro_pro12_ba_x64.msi

To know if you have 32-bit or 64-bit, please refer to this article:

After installation, you can activate by opening Nitro Pro, clicking on the Help tab > About Nitro Pro > Activate by entering the same serial number 23460x-xxxxxx-x91638

Thank you for choosing Nitro and I hope this helps.

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