This may be a rarified issue, but I've come across the fact that Windows no longer supports the old Write (.wri) file type at all. Wordpad pretends to open the .wri files, but it doesn't understand Write formatting. Unfortunately, I've also come across the need to open old Write files properly. There's a fake WRITE.EXE file included with Windows, but that program open Wordpad, not Write. Luckily, I was able to find a copy of the old Write program file (write.exe). For anyone that wants it, here it is: Write.
Advice: To open Write files embedded as an icon within another Write document, you will need to associate .wri files with MS Word (default setting is Wordpad). Then, open the other Write document with Write. When you double click on the embedded icons, Word will open the embedded document. If you don't associate .wri with Word, Windows will try to use Wordpad even though you have Write open. If you try to associate .wri files with Write, the embedded iconed Write files will not open at all.