Just seconding the point about creating a pdf copy first.

Even if you address the driver issue, I would not be surprised if the margins might still have issues (and I'm interested in how to minimize that). I have found that using Adobe Pro on the highest setting and embedding fonts gets me closest eventual print output to the electronic margins set within Word, but the document will still print differently across printers. This is normally not a problem for folks, but if you need to be exact, as it seems you need to do, and as I have had to do, this is one terribly cumbersome solution that I have used:

1. Save the doc with a new file name because you are about to embark on a journey
2. Save as a pdf, preferably with Adobe Pro but if not, use Word's Save As pdf feature. (If you will not be creating a pdf at any point in your process, then you can just do this with the Word document, but if, ultimately, you will be making a pdf, then do all the test printing from the pdf copy.)
3. Test print a page or two (which pages depends a bit on your document, but try to get one with full text that hits the four margins).
4. Measure with a ruler (yes, I know) to see how far off you are from the desired margin widths on all four sides.
5. Tweak margins in the Word doc, generate the pdf the same way, and print from the updated pdf on the same printer. To see the margin area better, make the gridlines visible (View tab); this is particularly helpful to locate the right margin. Use the same comp/printer setup that you will be using for the final print job, or this whole exercise will not help.
6. You will notice that when you change one margin, sometimes other margins output differently. Try not to jump out the window. Rinse and repeat. Try not to jump out the window. Rinse and repeat. Eventually you'll get a pdf that prints with the correct margins. Now set those margins for the whole document if you have not already, and clean up the carnage that probably ensued as a result of those margin changes.

Hopefully Andrew's suggestion fixed your problem.

Regardless, hopefully an advanced user will see my ridiculously cumbersome suggestion and send something better, and we will both be grateful.

I still work with a couple of publishers who insist on requiring a print copy for a preliminary review, which the user must print rather than me and which produces one setting, and then an electronic copy for the final from my machine, which requires other settings, and they measure with a ruler down to the mm in both copies. There is simply no emoji that will suffice, at least not one that would be acceptable under the forum guidelines!