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Activation- Serial no not recognised


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I have been using Nitro pdf for 3 year snow and today all of a sudden, it started not to work and tried to activate again and system doesn't recognize the serial no. I submit the support request but no response yet. So, I don't know what to do now!

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Allain Umailin

Hello @Mete,

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

What email address did you use to submit a support case so I can try looking again?

Did the affected machine installed a major Windows Update prior to this issue?

In order to further assist you, could you please provide a screenshot of your 'About Nitro Pro' window under Help tab?

Also, a screenshot of the error message you have received after entering your serial number.

To send them via private message, hover your mouse on top of my name 'AllainU' and select 'Message'.

To find out how to take a screen shot, check out this link: https://kb.gonitro.com/knowledgebase/#/search/screen/000004108 

Thank you very much in advance and I am looking forward to hearing back from you. 

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Hello Allain,

Thank you for the support, I need urgent solution as I realize how much I use Nitro in my daily work, when it fails.!!!

It started not working all of a sudden, I don't know why. I tried to reload but only trial version worked. so, here is the screen shot attached but dont know if it will help you.

here is also my serial no: 234600-xxxxxx-yyyyyy where the system doesn't recognize which is also very annoying. Please help, I dont know whats wrong!


Edited by AllainU
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