

endof10.org seems like a good website to direct people to via posters in your local community center or church. Or you can call a repair club in your area to ask if they want to be listed. Those are likely to have some Linux enthousiast members and already have a location.
I wouldn’t be surprised if there are a bumper crop of level 10 CVEs in the latest and “greatest” version of Windows 7 that will never get patched. Unless you have one of those special enterprise licenses that they keep updating.