Yesterday I consulted Excel help to learn how to use Frequency. I followed the instructions for copying and pasting an array formula. (Copy formula, select cells to display results, press F2 then Ctrl, Shft, Enter.) It wouldn't work. I tried 6 times and the formula pasted the 6th time. I created a new formula for another data column but the pasting method will not work any more. Today I opened Excel help, typed in "Array Formula" and a list of topics displayed. I selected the first topic. Although the main topic opened I cannot open any links within the topic. I tried many help topics but can't select sub topics or "See Also," or "Examples." Nothing happens when I click the links. I use Excel 2002, SP3. Any advice greatly appreciated.