And to add to Mr. Goldfield's advice, if you have an issue running the full installer for NVDA 2020.2, then manually uninstall whatever NVDA you currently have installed via Control Panel, Programs and Features, then trying to install the latest again.  But don't do that first, as an install-over install generally works just fine.
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Brian - Windows 10 Pro, 64-Bit, Version 1909, Build 18363  

Science has become just another voice in the room; it has lost its platform.  Now, you simply declare your own truth.

      ~ Dr. Paul A. Offit, in New York Times article, How Anti-Vaccine Sentiment Took Hold in the United States, September 23, 2019