Your free blocker is downloading
SheetGuard Companion is on its way to your Downloads folder. Open it, choose Standard or Deep Block, and restart Excel — Copilot is off.
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While you're here
Copilot was the loud one. SheetGuard fixes the rest.
The free SheetGuard add-in adds Tab Folders, Smart Undo, and Filter Guard — the power-user features Microsoft never shipped. Same publisher, free to start, and your spreadsheet data stays 100% local.