I don't know, but with the xp experience in the main MSSE still works on Intel machines there, and I suspect they will continue for a while.
The real end of XP was governed by third party software dropping support for it, but it still carries on working with the old stuff, and I've never had any problems with viruses, just very slow web sites in the main and often the inability of older browsers to access some sites. I suspect much the same will apply to Windows 7. Whether Microsoft will stop the old hack to get additional updates is debatable, but be wary of such things.
I do not know the NVDA policy on this. But I imagine there will be a heck of a lot of windows 7 users just like there was xp users for a couple of years so unless there is a compelling reason not to support it, I think it will work for a while yet, and in any case if you keep with the same nvda version then it will work as it always did.

To be honest the main reason not to use 10 is the new OS every 6 months issue. WE get used to things being as we learn them and often the updates change stuff all the time and can be a bit of an effort for  those who use third party software.
Otherwise I'd be on Windows 10.
Brian

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----- Original Message ----- From: "Monte Single" <mrsingle@...>
To: <nvda@nvda.groups.io>
Sent: Monday, March 11, 2019 8:47 AM
Subject: [nvda] using win 7 after january 2020

Microsoft will stop issuing updates for win 7 next January.

I have read comments that win 7 can be used safely after this time if some
conditions are followed.I understand these to be;

---a current browser such as firefox or chrome,

---an accessible antivirus and malware program.

What are antivirus and malware programs that will work with nvda in win 7?

Are there other items that I should consider if I choose to use win 7 after
January 2020?

Thanks,

Monte