About
NVDA (NonVisual Desktop Access) is a free and open source screen reader for computers running Windows. "NVDA allows blind and vision impaired people to access and interact with the Windows operating system and many third party applications." For more information visit the NV Access website.
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Getting Started
If you have installed NVDA with the installer, then starting NVDA is as simple as either pressing control+alt+n, or choosing NVDA from the NVDA menu under Programs on the Start Menu.