Recently, an update was done automatically and my Adobe Acrobat DC will close almost immediately after I double click to open a pdf file.

You can try these steps to solve the problem.  Actually the first step solved my problem.

1) Using Windows Explorer navigate to C:\Program Files (x86)\Adobe\Reader 11.0\Reader, then double-click on Eula.exe and accept the license agreement.  For me, I just do a search on my local disk C:\Program Files (x86)\Adobe\ for the file name "Eula.exe", then double-click the file and accept the license agreement.

2) Can you open Adobe Reader by itself?  If so, try disabling Protected Mode [Edit | Preferences | Security (Enhanced)].

3) It could even be a malware issue and you need usto do the repair steps.

Repair the existing Reader installation. Windows 7

a) Click Start.
b) Click Control Panel, and then select Programs and Features.
c) Select Adobe Reader and click Change.
d) Choose the option to repair the Adobe Reader installation.

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