Does this occur in only one particular document? If yes, then
open the document, and click on Format | Columns | One | Apply
to: Whole document | OK. Even if "One" already appears to be
selected, click on it anyway.

Or does this occur in all new documents? If yes, then locate and
open your Normal.dot file as described in Method 1 in
http://word.mvps.org/FAQs/AppErrors/...ocNotBlank.htm . Click
on Format | Columns | One | Apply to: Whole document | OK. Even
if "One" already appears to be selected, click on it anyway. Type
a character or two and delete what you just typed. Save the
Normal.dot file and close it.

Emma Schmidt wrote:
When I type ordinary documents in Word, as soon as I reach the end of the
first page, anything I type disappears. So far the only way to see it is to
ctrl+enter and create a page break. However this causes formatting issues
(ie big gaps). If I make any editorial changes to the first couple lines of
the second page, it will disappear again.