Excel Remove Duplicates Not Working: How to Delete Invisible Control Characters

Excel’s Remove Duplicates feature can fail to identify duplicate rows that appear identical. This happens because invisible control characters hide within your cell data. These non-printing characters cause Excel to see two cells as different. This article explains how these characters get into your data and provides steps to clean them out so Remove Duplicates … Read more

Excel Text Disappearing While Typing: How to Turn Off Overtype Mode

You are typing in an Excel cell and your existing text vanishes, replaced by new characters. This is not a glitch but a specific keyboard mode. Overtype mode replaces characters to the right of the cursor instead of inserting new ones. This article explains why Overtype activates and provides the steps to turn it off … Read more

Excel VLOOKUP Returns #N/A When Data Exists: Remove Hidden Spaces With TRIM

Your VLOOKUP formula returns #N/A even though you can see the lookup value in your table. This common error often occurs because of hidden spaces in your data. These spaces can be leading, trailing, or extra spaces between words that are not visible at a glance. This article explains why these spaces break VLOOKUP and … Read more

Excel Personal Macro Workbook PERSONAL.XLSB Not Loading: How to Recover It

Your Personal Macro Workbook, PERSONAL.XLSB, is not loading when you start Excel. This file stores your global macros and is meant to open automatically in the background. The problem is often caused by a corrupted file, a blocked location, or a disabled add-in. This article explains how to find, repair, and restore your personal macros. … Read more

Excel Data Validation Circles Won’t Go Away: How to Clear Invalid Data Markers

You have cleared the data validation rules or corrected the cell values, but the red error circles remain visible on your worksheet. These persistent markers are visual indicators for invalid data that Excel continues to track. This happens because clearing the rule does not automatically remove the visual flag from previously marked cells. This article … Read more

Excel CSV Saved With Garbled Characters: How to Fix the File Encoding

You save a spreadsheet as a CSV file, but when you open it, the text is corrupted with strange symbols. This happens because Excel uses a default text encoding that does not support all characters. This article explains how to save and open CSV files with the correct encoding to preserve your data. Key Takeaways: … Read more

Excel #NULL! Error: How to Fix Incorrect Space Used as a Range Operator

The #NULL! error appears in Excel when you use an incorrect range operator. This happens most often when a space character is typed between cell references instead of a proper operator like a colon or comma. The error indicates Excel cannot interpret the formula’s intended calculation. This article explains why the error occurs and provides … Read more