Russ,
I have Vista 32 bit and IE9. I don't generally use IE9, instead I use Firefox 52.4.0 and Yandex 17.4.1.1026.
I can not upgrade beyond IE9
Although Vista was supposedly (?) patched to run TLS 1.1 and 1.2 IE9 was not and will not be. Also, supposedly (?) Firefox has it's own plug in runtime libraries which supposedly (?) can run 1.1 and 1.2. I guess I will find out.
I am not sure about Yandex, though it uses the Google Chrome engine.
Here is a screen shot of IE9 > Internet Settings > Advanced