@edgarblythe,
What you're talking about sounds a lot more like Microsoft issues rather than HP.
Virtually every non-Apple computer sets up the way you're talking about. Just let it, and change everything later. If it really bothers you, write to the Department of Justice and tell them to get on the stick with an antitrust lawsuit against Microsoft. This isn't HP's (or Dell's, Acer's, etc.) doing.
As for your issue with Word, right-click on any of the files which you want to open with some other program. Choose
open with and then select
choose another app. Then select the program you want to use (may need to scroll a bit). When it asks if you want to set the other program as the default for opening your documents, say yes (this may be a box you need to check; I can't recall as it's been a bit since I did this). You may just be able to click a button that says
Always. See if that fixes the issue.