Hi Raj ,
Welcome to Microsoft Community :)
It's my pleasure to help you today.
I’m sorry you’ve had to deal with this.
How do I encrypt and decrypt documents:
https://support.emsigner.com/category/how-do-i-...
I hope it helps :)
Sincerely,
Juliet
Independent Advisor
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the software is developed by winsoft and is a smart signer utility using to encrypt, decrypt and digitally sign files the issue is it is giving certificate error when trying on Windows 10 same is working on Windows 7 same certificates are imported on both machines.