If you've ever been deep in Power Query, building a clean transformation step by step, only to have your source file yank you back to the desktop, you know the frustration. That interruption isn't a bug you're causing, it's a signal that Power Query is trying to refresh a preview of your data, and it needs the source file open to do it. The problem is that the tool doesn't warn you, and it doesn't give you a graceful way to close that file without breaking your workflow. You're left stuck between two windows, unable to edit in Power Query until the source file is closed again.
This isn't a user error. It's a design friction that legacy spreadsheet tools have accepted for years. Power Query was built to connect to external data, but the way it handles local source files, especially Excel workbooks, assumes you're willing to let the application take control of your screen. The source file pops up because Power Query's data engine needs to read the current state of that workbook, and on many systems, it opens the file in the same Excel instance you're using. The result is a jarring context switch that breaks concentration and wastes time. The fix isn't a secret keyboard shortcut; it's understanding that this behavior is a symptom of a tool designed around desktop conventions, not around the modern expectation of uninterrupted, background data processing.
What this means in practical terms is that if you work with Power Query regularly, you have two honest options. One is to store your source data in a format that doesn't require Excel to open, like a CSV or a database connection, so that Power Query never needs to pull focus. The other is to accept the interruption and plan your work accordingly: open the source file first, leave it minimized, and accept that Power Query will occasionally steal focus when it refreshes. Neither option is ideal, and neither solves the core problem. The tool should be able to read a local Excel file without opening the workbook window. It should handle that in the background, the same way it handles a SQL query or a web API.
Our take is straightforward: this interruption is a relic of a time when spreadsheets were the only game in town. Users deserve a data preparation experience that respects their focus. If a tool can't read a source file without physically opening it on your desktop, it's time to question whether that tool is built for the way you actually work. The good news is that you don't have to accept this friction. Explore alternatives that treat your source data as data, not as a document that needs to be opened. Your workflow, and your concentration, will thank you.