A family of Microsoft word processing software products for creating web, email, and print documents.
Hello,
Check that proofing tools are installed for your language (File, Options, Language), ensure “Check spelling as you type” is on (File, Options, Proofing), and confirm the text is not set to “Do not check spelling or grammar” (Review, Language, Set Proofing Language). Restart Word after changes. If it still fails, run Office Repair from Control Panel, Programs and Features, select Office, Change, Quick Repair.