For those who cannot use the in-app updater, you can manually download patch files ( ) from the Adobe Acrobat DC Release Notes
If the update download is "fixed" but not progressing, wait 20 minutes. Adobe’s legacy update servers are extremely slow. Do not cancel the process—let it run overnight if necessary. adobe acrobat pro dc 2015 update download fixed
Once downloaded, do double-click immediately. Follow these fixed steps: For those who cannot use the in-app updater,
If the update still will not "fix," uninstall Acrobat Pro DC 2015 completely and install the final patched version from scratch. adobe acrobat pro dc 2015 update download fixed