Problems opening PDF files in Acrobat DC

[ingerie6879]

When I try to opt PDF files with acrobat DC I get this error message: There was an error opening this document. There was a problem reading this document (11).

Also when I try update Photoshop CC I get Update Failed Errigs encountered during installation U44M1P7 

[John T Smith]

U44.. update error http://forums.adobe.com/thread/1289956 may help

Run as Administrator http://forums.adobe.com/thread/969395 to assign FULL permissions may help... says Encore, but sometimes required for ALL Adobe programs (this is NOT the same as using an Administrator account)

[Sheena Kaul]

Moving to Installing, Updating, & Subscribing to Acrobat​