Variable Locked Cells dependant on cell change

[freud1]

Hi Guys,

I'm trying to make a spreadsheet more secure to prevent unintentional changes.

What i'm looking to do is to lock all cells so no changescan be made unless the user clicks column A.

Column A should remain unlocked and when the user clicks it i would like the entire row unlocked for editing (but only after column A is clicked)

I will run a macro to lock the entire sheet again once the sheet closes.

can anyone help with this or point me in the right direction?

many thanks