Do you see "OVR" on the status bar (Overtype mode). Press the Insert key
http://www.mvps.org/dmcritchie/excel/statusbar.htm

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HTH,
David McRitchie, Microsoft MVP - Excel
My Excel Pages: http://www.mvps.org/dmcritchie/excel/excel.htm
Search Page: http://www.mvps.org/dmcritchie/excel/search.htm

"UFO" wrote in message ...
I haven't been using excel for that long and all of the sutton I get a black
square box instead of my normal curser and I don't know how to get back to
the normal curser.
Please help me