For some reason the upgrade to 4.9 fails for them everytime. It seems it's only happening to users who are on version 3.4. Everything seemed to go fine, until we received some calls from users who are missing apps and/or can't connect to the Citrix Receiver. It's extremely odd.We are trying to deploy Citrix Receiver 4.9LTSR to our users (using a shutdown script with gpo). Plus, reinstalling via Adobe CC turned out not to be the latest version. Now I cannot update and repair the installation of Acrobat DC desktop app. And these files may impact the updating and installation repairing procedures. I finally tried to download the update file and install it directly, but I found there may be some access issues that the Update Program cannot write some RBF files. I also tried to uninstall and re-install the software, but nothing changed for this error. Complete that installation before proceeding with this install) will arise when I execute the solution. However, another error code: 1618 ( Another installation is already in progress. Then, in Acrobat or Reader, choose Help > Check for Updates.

By searching it I have known this requires shutting down Microsoft Office and all web browsers.

The auto-updating of Acrobat DC to Version 21.007.20091 is collapsed due to the error code 1603 (A fatal error occurred during installation).

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