Can I download an older version of Adobe Reader (before Reader DC) on a Windows 7 machine? I don't want the tabs version; I want to be able to view two different .pdf files simultaneously.
You have the possibility to download version 11 and DC through the official website (see link below). For additional downloads regarding previous versions, another website has to be visited.
The website is called OldApps, and you can browse it through Google Search: https://goo.gl/Dwzjqr
Official website: https://get.adobe.com/reader/otherversions/