Since the upgrade of Acrobat to Acrobat DC I've not been able to normally view a pdf file anymore.
I've now re-installed Acrobat DC twice, so there is no solution
The only consequent response in the Acrobat window is the windows message "not responding".
If I wait for a few minutes I may be lucky and I may be able to view the pdf file.
What has changed so dramatically between the versions that makes this happen?
Sorry for the delay in response to your query and apologize for the inconvenience caused. As per the description above, the Acrobat DC is freezing and not responding when you view a PDF file, Is that correct?
Please refer and try the troubleshooting steps from the following KB docs Troubleshoot errors, freezes | Adobe Reader | Windows Link: https://helpx.adobe.com/acrobat/kb/troubleshoot-errors-freezes-reader-windows.html
You may also try to reset the preferences of Acrobat DC, to reset the preferences, please refer to How to reset Acrobat Preference settings to default. Link: https://forums.adobe.com/docs/DOC-8511
If the issue persists, please share the following details:
Hope the information helps, and keep us posted with the results.