Adobe
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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