Reader Install fails with Error 1721
Updates to Reader have been failing for about 2 months. Today I uninstalled Reader and tried to reinstall it per the instructions on the Troubleshooting page. On the first attempt thru Firefox it appeared to be 99% complete then failed with an error message "Newer Version already installed".
I tried closing my browser and launching the installer directly. This time it appeared to successfully install Reader and progressed thru the Optimizing Performance and Publishing Product Info stages but stopped with error 1721 When MSI tries to launch RdrServicesUpdater. Event Viewer shows - Action: InstallWebResources, location: C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrServicesUpdater.exe, command: 19.012.20034
Searching my hard drive for RdrServicesUpdater shows a "RdrServicesUpdater2_1901020100.exe" at C:\ProgramData\Adobe\ARM\{291AA914-A987-4CE9-BD63-AC0A92D435E5} installed about 2 months ago about the time my problems started.
Is there a way for me to install Reader without trying to launch the RdrServicesUpdater or somehow direct the installer to use RdrServicesUpdater2_1901020100.exe if that is a viable option?
Thanks in advance.
(By the way I'm running Windows 7 64 bit with Firefox 67.0)
Update: So I restored my System back to when I had the older version installed, Ran the C++ update as described in the almost identical thread on this site about error #1722 (got a message the update already was installed), manually swapped the msvcr120.dll and msvcp120.dll files (per Option 3) and then retried the Reader update with the same result as above, the first time it said "newer version installed" and undid the update. Then I ran the install locally and again it stopped after optimization and publishing the program info with the #1721 error. This time I just killed the installer and MSI processes while it was waiting for me to acknowledge the error and before it could revert the update, which left me with the newer version by the brute force method.
It is unfortunate that the installer is written to undo a viable update just because it can't confirm that it is the latest version with the local updater.
Waiting for a more elegant solution, but in the meantime I guess I've got a workaround to manually update Reader....
