Re: tracking down NVDA triggers
There is likely some corruption in your Windows 10 installation itself that needs to be remedied. The probability of this being an NVDA-based issue is very small indeed, particularly if you've already tried uninstalling NVDA and reinstalling it.
c) How to do a CLEAN Installation of Windows 10 (Tom’s Hardware Forums, with screen shots)
I never choose the “thermonuclear option,” the completely clean reinstall, until it's clear that this is the only viable option. I hate having to go through all the work of reconfiguring a machine from scratch if that can reasonably and safely be avoided.
Brian - Windows 10 Pro, 64-Bit, Version 1903, Build 18362
The color of truth is grey.
~ André Gide