A common cause of this is that you are in "Extended" or "Add" mode.

If you see "EXT" or "ADD" down on the status bar try hitting F8 key a couple
of times.

F8 will will toggle you in and out of Extended mode. SHIFT + F8 will put you
in "ADD" mode.

If you are using a wheel-mouse tap the wheel a couple times.

Also see David McRitchie's "Ghosting" at

http://www.mvps.org/dmcritchie/excel/ghosting.txt

Gord Dibben Excel MVP

On Sat, 22 Jan 2005 07:33:02 -0800, "sandenscot"
wrote:

I have a laptop...so the problem is not a scrolling mouse wheel.....when I
select a cell in the workbook it will not let it go....as I move the mouse
around it keeps selecting all the sells as if i have the mouse held
down....do not appear to have a key stuck either......however...when the cell
is selected...(before i click the cursor in a cell) i can move around to
different cells with the arrow keys and it only selects one cell at a
time...like it is suppose to...as soon as I click with the mouse the whole
spreadsheet continues to be selected wherever i move the mouse...even if i
move the mouse off the spreadsheet....it just keeps selecting all the cells
in that direction....HELP