Yes, Windows 10 does have a spell checker. Microsoft Word has a built-in spell checker, as does the Edge browser. Additionally, you can select and right-click any word to see options for spelling and grammar. To enable the spell checker for other programs, such as Notepad, simply head to Settings > Time & Language > Region & Language, then select the language you need the spell checker for and click “Options.” From there, click “Proofing” and check off “Check spelling as you type.”