Adobe

Adobe Reader DC Direct Download

https://get.adobe.com/uk/reader/direct

Adobe Creative Cloud CC Cleaner Tool

https://helpx.adobe.com/creative-cloud/kb/cc-cleaner-tool-installation-problems.html

HOWTO: Install Adobe Acrobat Reader In Ubuntu

cd ~/Downloads && wget -c http://ardownload.adobe.com/pub/adobe/reader/unix/9.x/9.5.5/enu/AdbeRdr9.5.5-1_i386linux_enu.deb
sudo dpkg -i AdbeRdr9.5.5-1_i386linux_enu.deb

Thanks to AskUbuntu

HOWTO: Remove The Sidebar In Version 11.x

Click on the Tools button once, then restart the software.

OFFLINE INSTALLERS | ALL PLATFORMS

http://www.adobe.com/es/products/flashplayer/distribution3.html

Not working/not responding Windows

https://www.thewindowsclub.com/adobe-reader-not-working-windows-10

Alternatives

Affinity