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AcroRd32.exe causes high CPU usage and hangs when closing Adobe Reader on RDS

 

Issue

Adobe Reader hangs in the background after being closed and AcroRd32.exe process continue to use high CPU usage.

Cause

The issue is a result of Adobe Reader Messages. Messages are presented at the bottom of the main pop-up such as shown below (Add Notes to a PDF File). When disabled, I found the executable to close and release CPU and memory usage, therefore not hang.

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Resolution

To test on a single user you can remove the messages function within the application itself.

– Open Adobe Reader

– Go to Edit – Preferences

– Navigate to General Category

– Uncheck the option to Show me messages when I launch Reader

Select the option Don’t show messages while viewing a document

Test the application. You should see when you open and close Adobe Reader, the executable ends almost immediately. You can confirm this in task manager or using a tool such a Process Explorer. You will also see the Messages do not appear anymore when you open Adobe Reader.

To apply this to all users on the Remote Desktop modify the following registry keys to 0 as shown below.

HKEY_CURRENT_USER\Software\Adobe\Acrobat Reader\10.0\IPM
ShowMsgAtLaunch (REG_DWORD) 0
DontShowMsgWhenViewingDoc (REG_DWORD)  0

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