Hi, Can you give us some more information. Where are you downloading from? Which operating system? Downloading software is an independent activity that is not related to whether or not you have a spell checker program on your computer. I suggest that you go to SMART Tech's website here:
http://www2.smarttech.com/st/en-US/Support/Downloads/default.htm
And select the appropriate Notebook installation based on your operating system. After you click download and fill out the required fields, please Save the file to your desktop first. Do not choose Run until the download is complete. After the download is complete find the file on your desktop and double-click the file to begin the installation.
Let us know. =)
~Jason