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Excel is not working correctly for me. When I change the input of a formula, the output is not automatically updated. Could this be due to a virus? How do I get Excel to update formulas automatically again?

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No, it's not a virus. –  SLaks Oct 30 '12 at 23:36
possible duplicate of Why does Excel not auto-update my equations anymore? –  Excellll Aug 14 at 22:55

3 Answers 3

If it is, this sounds like one of the most annoying viruses in the world!

No, most likely you simply have calculations set to Manual, or something else similar such as an add-in, macro or extension e.t.c. that is interfering with the normal operations of Excel.

To check for the easiest one, go to Formulas > Calculation Options, and make sure it is set to Automatic

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I had trouble getting formulas to update, until I realised some cells had formatting applied (formatted as Text I think?). Fixed by right-clicking on the cell, selecting Format Cells... and choosing General under Category.

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I had the same problem and when I changed the format to "number" the cells started calculating and updating correctly.

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