How to Lock Cells in Excel: The Critical Step Everyone Skips
Checking Locked in Format Cells does nothing by itself. Cells are locked by default already; only protecting the sheet from the Review tab actually enforces it.
Excel
How to Understand an Inherited Excel Spreadsheet
Auditing a workbook is read-only, which makes it the safest use of AI in Excel. Map structure first, then hunt the four hazards that fail silently: hardcoded values, dead links, hidden sheets and stale ranges.
AI Pivot Table Summaries: Where They Quietly Go Wrong
A column called Amount usually includes refunds as negatives. AI assumes it means revenue received, produces arithmetically perfect output describing something else, and nothing flags the difference.
How to Clean Data in Excel With AI Without Corrupting It
A cleanup applied to five thousand rows in one pass is also a mistake applied to five thousand rows in one pass. Which cleanups you can undo, which destroy the original, and the workflow that keeps everything recoverable.
How to Write Excel Formulas With AI (And Check Them)
Generating the formula is the easy part. A range that starts one row too low produces a plausible wrong number that nobody notices for a quarter. Here is how to ask well, and the four-minute check that catches it.
Excel COPILOT Function Retired: What to Use Instead
Microsoft’s documentation states the Excel COPILOT function stops being available on 14 September 2026, and the web rollout was cancelled. If you built anything on it, this is a deadline rather than a heads-up.
Copilot in Excel: Why It Does Nothing, and What It Costs
Most people who pay for Copilot in Excel cannot use it on the first attempt, and it is rarely a licensing fault. Microsoft documents several conditions that must be true first, and none appear on the purchase page.
How to Use Conditional Formatting in Excel (Rules That Update Live)
Apply conditional formatting in Excel, from simple highlight rules to Custom Formula rules, and fix formatting that highlights the wrong cells.
How to Make a Budget in Excel (Simple, No Template Needed)
Build a working monthly budget in Excel with Income, Planned vs Actual Expenses, and a live Summary tab — no downloaded template or macros required.
How to Use IF Function in Excel (With Real Examples)
Write IF formulas in Excel step by step, combine IF with AND and OR, and know when nested IFs have gone too far and it’s time to switch to IFS instead.