When you want to copy the result of the cell to another cell in Excel, the target displays an invalid references error messag. This error can be avoided by copying cell value into target cell and not the whole formulas.
Some installations or settings changes require you to restart your computer. In most cases you don't need to actually reboot it, you only need to restart the explorer.exe process.
Sometimes when you are writing a title, one last word jumps into the next row. If you don't want to change the font size, there is another way to deal with these so called widow words.