Are you saying that everything on the worksheet disappears, even though
you can click on a cell and see its contents in formula bar?
When you replaced the computer, were you able to open the same file as
before and see the cell contents?

Brad wrote:
When I type details into excel cells (numbers, dates, narrative) they are
visible, but in time they disappear - I can see them in the formula bar, but
not on my monitor. I replaced my computer which helped for a few days but
occured again. Then we re-loaded excel, and then used another copy of excel
and it still happens. I have not hidden the cells or did anything related to
the security features available.
Help!