lock specific cells, not the worksheet

Hi,

This will be a little confusing, but here we go:

First Select all your cells (Ctrl + A), then Right Click, and go to "Format Cells", or just simply click CTRL+1,
Go to "Protection" Tab and Uncheck the "Locked" Box. Click "OK".

Select the cells you want to lock, and do the same procedure, but this time check the Locked Box.

Now you can click Protect Worksheet, or Protect Workbook.