Butch Walker wrote:
I'm working with Excel 2003. All of a sudden I can't highlight a single
cell. When I move the cursor with the mouse or an arrow key, a range is
created. I've shut my computer off and restarted it, but it continues to do
this. How can I get out of this?

I had this problem recently. In my case, I had merged cells near the
top of the sheet that created a table effect for the rest of the sheet.
See if this is the case. If so, unmerge them and you will be able to
select what you want. Then you can either remerge or reformat your
worksheet altogether.