Yes, it looks like Vista Home cannot download language packs, only the Vista Ultimate and another have them available. From what I gather, the packs for your Vista were discontinued back in 2007, probably to help make the more expensive Vistas more attractive.
You didn't say what version of ebook you are reading - pdf? The Adobe Digital Edition has other languages, but not Russian.
If it is a Microsoft Reader, that only works up to Windows XP, not Vista.
I found person with Vista Home base and he able to open download file.
My downloads can't be open becouse it's open with Word. How to change this?
I have language pack update. Problem with Word.\Thank you