Before you download, it is important to know which version you actually need, as Microsoft has used this name for two different products:
A "Metro-style" app used for PDFs, XPS, and TIFF files. Support for this ended in 2018 in favor of Microsoft Edge. how to download microsoft reader
A built-in accessibility tool found in modern apps like Word, OneNote, and Edge. 1. How to "Download" the Modern Microsoft Reader (Edge) Before you download, it is important to know