Adobe Acrobat constantly saying not responding

I had a previous case # 188054149 open about the application running very slow and thought we came to a resolution but the provided fix did not work on a particular PC.  This is the fix I was provided with:

• Open Acrobat
• Go to Edit > Preferences > Accessibility

o   Uncheck the options:

o   Use documents
structure for tab order when no explicit tab order is specified

o   Enable assistive
technology support

• Go to Edit > Preferences > Reading

o   Select: ‘Only read the currently visible pages’ for Pages vs Document dropdown

• Go to Edit > Preferences > Search

o   Increase Maximum
Cache size to 1000MB

o   Click on Purge Cache
Contents

I double, triple checked the settings and issue persists.  Please advise.