Hi,
On your sheet left click the grey box in the top left hand corner of the
sheet (Above Row 1 and to the left of Column A) this selects all cells on the
sheet.
Right click and selct Format Cells then the Protection Tab, uncheck the
Locked box and click Ok.
Select the cell that you want to lock/protect. Right click, Format Cells,
Protection tab and check the Locked box, click OK.
Select the Tools menu from the top of the screen and Protection, the protect
sheet.
Uncheck the Select Locked Cells box.
Enter a password, click ok, enter the passwaord that you used in the
previous step and click ok.
Hope this helps,
Gav.