Following 2021.005.20048 installation, PDF files open very slow, and Reader works very slow

Question

Following 2021.005.20048 installation, it takes several minutes for a PDF file to open in Adobe Reader, which would take only seconds to open before. Once open, if the PDF has several pages, it moves up and down through the pages very, very slow, and when you close the application, it shows a message saying "No Response" and takes several minutes to close, and during that process, it slows down the PC.

Any suggestions?

Amal. · Answer

Hi Jose

Hope you are doing well and sorry for the trouble. As described, after the update the Acrobat reader DC is very slow.

Please try to reboot the computer once and see if that helps.

If it doesn't work, please try to repair the installation (Win Only) from Help menu. Go to Help > Repair installation and reboot the computer once and check.

If the PDF file is stored on a shared network/drive, please download it to your computer and then try to open the document and check for the issue.

You may also try to turn off the protected mode for testing (Win Only) go Edit > Preferences > Enhanced Security > Uncheck 'Enable protected mode at startup' Turn off the protected mode and uncheck 'Enhanced Security' > Click OK and reboot the computer.

Note: Please turn on the security after testing to avoid any security risks.

Also, go to Edit (Win), Adobe Acrobat (Mac) > Preferences > Page Display > Under Rendering , Uncheck 'Use Page Cache' > Click OK and check if that makes any difference.

If it doesn't work, please reset the Acrobat preferences to default as described in the help page - https://community.adobe.com/t5/acrobat/how-to-reset-acrobat-preference-settings-to-default/td-p/4792082

Regards

Amal

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