code 0x66A(1642)

[Piia24421670nww1]

what is that code? Adobe Acrobat DC Pro did not install...

[Karl Heinz Kremer]

This is usually an error that is associated with an update. Are you trying a new installation, or are you trying to install an update? What operating sytem are you using, and which version of Acrobat are you trying to install ("DC Pro" does not give us enough information, it's more a type of installation and not a specific version)?