Me again...
I have now got the old Windows 7 laptop out, and yip, it prints perfectly....
The printer settings on old laptop is Preserve Layout = YES: if it is NO, it cuts off the top&bottom margins. The left/right margins print as set in Word and the printer automatically increase the top/bottom margin, presumably to compensate for the printer rollers. The font size stays the same and the document is easy to read and looks professional.
On the new Windows 8 laptop, the exact same document with the exact same settings, double sided printing increase the margins all around. This is very unfortunate because the font and everyting gets smaller in order to fit into these margins and make it difficult to read easily.
So there it is!
What can I do?