To rule out printer driver problems, I'd try printing to a different
printer, or re-installing the drivers for your existing printer(if you have
only one).
Is it only printing from word that gives you problems. I take it you can
print successfully from other applications?
Another thing you could check is that you have sufficient memory. Is this a
problem that has recently started, or has it always been the case? If
recent, have you changed anything on your computer that may have caused the
problem(installed new/changed/removed software, changed/added/removed some
hardware).
As a last resort, you could try re-installing Word, but I'd try as many
other things first as I could think of first, before resorting to that.
Cheers,
Chris.