Seems more likely that you had a workbook open in which Calculation was set
to manual.
If it happens again try pressing F9.
best wishes
Bernard

"jean" wrote in message
...
Was adding my spreadsheets and the numbers would not add up. So I shut my
computer down and ran a norton anti virus program. It seemed to correct
the
problem for now but can someone advise me if there is a virus out there
that
is affecting the spreadsheet programs
Thanks
Jean