about 30 seconds after opening a pdf, the programme closes due to an unexpected reason,
what can I do to solve this problem?
Sorry for the delay in addressing your question.
If you are still experiencing the same issue, then try a couple of suggestions given below:
1- If it is a file-specific issue, check with a different one.
2- To check the update, Go to Acrobat> Help > Check for updates and reboot the computer once (you must save all the work before restarting)
To download the patch manually, more information about this release is here: Release Notes | Adobe Acrobat, Reader
3- If its an issue with multiple files and you are running the latest version as well, then
Navigate to Reader>Edit>Preferences>Security (Enhanced)>disable "Protected Mode at Startup" and "Enhanced Security">OK>Reboot Reader (Win).