Large PDF files (5MB) lags/ freezes when loaded / viewing

Hi Leon,

Hope you are doing well and sorry for the trouble. As described the Acrobat DC application either crashes or loads up too slow when viewing detailed diagram plans and it works fine in Adobe Acrobat Reader DC application.

As you have the latest version of the Adobe Acrobat DC Please try to reboot the computer once and see if that helps.

If the file is stored on a shared network/drive, pleasedownload and save the file to your computer first and then try to open it with Adobe Acrobat DC

If it still doesn't work, please go to Edit (Windows), Adobe Acrobat (Mac) > Preferences > Page Display > Under Rendering Uncheck 'Use page Cache' > Click OK

You may also try to turn off the protected mode for testing (Windows Only) Go to Edit > Preferences > Enhanced Security >  Uncheck 'Enable Protected mode at start up' Turn off the protected mode and Uncheck 'Enhanced Security' > Click OK and reboot the computer once.
Note: Please turn on the security after testing to avoid any security risks.

If it still doesn't work, please try to create a new test user profile with full admin rights in Windows or enable the root account in Mac and try using the application there and check.

You may also check out the help pages listed below for additional information:

Mac: https://helpx.adobe.com/x-productkb/global/troubleshoot-system-errors-freezes-mac.html

Windows:https://helpx.adobe.com/acrobat/kb/acrobat-dc-crashes-on-windows-os.html

Hope it will help

Regards

Amal