Welcome to our new Microsoft Q&A Platform
For your question in the title. I want to say No, we don’t need to worry about Windows Update after disable WSH.
The phenomenon you met is normal, I also meet with the same situation after I upgraded system or updated drivers software, the command-line window tells me that desktop graphic performance or something other need to be evaluated or re-testing, because operation was executed too quick so I can’t see the specific content. On my PC, WSH is always disabled...
About your this word:
>in the past I have seen installation programs that used VBScript. Is this still common?
Sorry, I don’t know, I am not a programmer or an expert on the subject, Windows Script Host provides an environment in which users can execute scripts in a variety of languages that use a variety of object models to perform tasks. It will influence script’s running but I don’t think it will influence general programs’ installation.