Mouse pointer changes into a black box

If your mouse cursor changes into a black box when moved over blank areas in a PDF document, use the solution below as a workaround.

The problem is intermittent in nature, and reported for the May 2016 release of Acrobat Reader DC and Acrobat.  

Solution: Remove the icon cache file

Adobe is working to resolve the issue. Meanwhile, follow these steps as a workaround:

  1. Open the local appdata folder: 
    C:\Users\<user name>\AppData\Local\Adobe\Acrobat\DC
  2. Delete the following file in the local appdata folder:
    • For Acrobat Reader DC: IconCacheRdr.dat
    • For Acrobat DC: IconCacheAcro.dat
  3. Relaunch Acrobat Reader DC or Acrobat DC.

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