Spell Check in Excel

I am experiencing problems while working in a spreadsheet/workbook. The
spell check comes on and will not go off. It is saying do you want to start
at the beinging of the spreadsheet, I say yes, it says the spell check is
complete do you want to start at the beginning and I say no. And it will not
go off. I cannot work in the sheet. It just keep coming up. Thanks Patc