|re: I have a sheet with value in A1 thru A10 that I want people to choose from using drop down|
Obviously, I can't see your spreadsheet from here, so I can't tell you what the problem is.
I assume you have selected a cell outside of A1:A10. You then used Data...Validation...Allow: List...Source: =$A$1:$A$10
Select the cell with the drop down. Format...Cell...Protection tab...uncheck the Locked option.
Tools...Protection...Protect sheet. Make sure that the Select Unlocked cells option is checked.
If you unlock the cell that contains the drop down and then protect the sheet while allowing users to select Unlocked cells, users should be able to choose a value from the drop down. I do it all the time...I just proved it to myself again this morning.