Re: NVDA doesn't read context menu
Others have already covered the items in #1 on this list, but I'm putting it here for completeness. There is a pretty standard succession of things to try when any issue comes up, in order, depending on whether NVDA is involved or not. If it's not, then skipping item #1 is fine.
1. The Most Basic Troubleshooting Steps for Suspected NVDA Issues
2. Using SFC (System File Checker) and DISM (Deployment Imaging Servicing and Management) to Repair Windows 8 & 10
[Preferably before doing #3 and absolutely before doing #4, taking a full user data backup and a full system image backup is required.]
3. Doing a Windows 10 Repair Install or Feature Update Using the Windows 10 ISO file
4. Doing a Completely Clean (Re)install of Windows 10 Using Media Creation Tool to Fetch the Win10 ISO File
(and since you will have already fetched the ISO file for step 3, you can begin in the instructions at the point immediately after it's been downloaded, or you can instead
follow these instructions: Doing a Completely Clean (Re)install of Windows 10 Using Media Creation Tool to Create Bootable Win10 Install Media on a USB Thumb Drive)
Brian - Windows 10 Pro, 64-Bit, Version 20H2, Build 19042
Always remember others may hate you but those who hate you don't win unless you hate them. And then you destroy yourself.
~ Richard M. Nixon