hi
you (or someone) may have inadvertently pressed the F8 key. this puts xl in
extented selection mode. tap the F8 key and see if the problem goes away.
extended selection is boolean. tap F8 once to turn on, again to turn off.

Regards
FSt1

"Fivespeed56" wrote:

Using Excel 2007, when I click on a single cell the program highlights more
than that single cell. the issue is not consistent nor does it repeat from
one worksheet to another.