A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
Unprotect the sheet
Right-click the Optionbutton and choose "Format Control"
In the Protection tab uncheck "Locked"
Do that with all Optionbuttons
Each Optionbutton can have a different linked cell.
If you format the Optionbutton look into the Control tab which cell you have in "Cell link".
In the sheet, right-click these cells and choose "Format cells"
In the Protection tab uncheck "Locked"
Protect your sheet
Your sheet should work.
Otherwise you might have other links to protected controls or VBA code that wants to change something or...
In this case we need to see your file.
Andreas.