Please try the below steps and let me know if problem still persists or fixed by any of the steps below:
1. Please update your windows 10 to the latest version available.
2. Also please update Adobe Reader to the latest version 2015.023.20053
for this you have to go to Help-->Check for Updates.
Incase it is already updated you will see "No updates available"
3. If the problem still persists, please go to
Edit-->Preferences-->Signatures-->Creation & Appearances(More)
Please uncheck box "Use modern user interface for signing and Digital Id configuration"
We have tested this again on our Windows 10 PC's running OS version 10.0.14393, Adobe Reader DC has been updated to version 2015.023.20070. Since we still had the problem, we unchecked the "Use modern user interface for signing and Digital ID configuration". After doing so, instead of not responding when we click on Sign, we get the attached error.
The same certificate works in the same version of Reader DC installed on Windows 7 Pro x86 & x64 without having to uncheck this option.
Thank you for reporting back.
I hope that that the certificate you are using is not revoked. Also please go to Edit-->Preferences-->Signatures-->Verification-->Verification Time-->"Verify Signatures Using"
Can you please tell what option is selected. If the selected option is "Current Time" and the certificate is revoked, we usually get this error message
However,since the issue is not reproducible on Windows 7 Pro x86 & x64, we request you to please share any pdf signed with this particular certificate in Reader DC .
Thank you for your help. I am still experiencing this issue. These are my Signature Verification Preferences:
When I try to Digital Sign the PDF, I get this error message:
If I click on Continue, the screen grays out and I can't sign anything. I have to hit the Escape key to get out of it. It has also just crashed the program. When I choose to send the crash reports to Adobe it tells me there is no workaround. This is VERY frustrating. Please help.
Please click on "Digitally Sign". This should open the list of digital ids present. Click on "View Details" link beside the digital Id.
Please send us a screenshot of "Summary","Details","Revocation","Trust" tab. Go to each tab and send us screenshots of each of them.
This would give us the certificate details and help us analyze why the certificate is invalid for signing.