Hush Keys – Disable F1 in Excel

Hush Keys disables the F1 help key in Microsoft Office applications. It targets a specific frustration: when working in Excel, an accidental F1 press opens the help pane, breaks focus, and derails concentration. The app intercepts F1 silently when Office is in the foreground, leaving it fully functional everywhere else.

Why I built this
I built it for myself. Reviewing & building financial models means a constant F2 -> edit -> Esc rhythm, and every so often, your finger slips and the help window steals your focus. The traditional fix was to pop the F1 key off your keyboard. Works on a desktop, less so on your (internships) corporate ThinkPad.

Key Features

• Disables F1 in Excel, Word, PowerPoint, and Outlook
• Operates at the system level - no macros or admin rights required
• F1 works normally in all other applications
• No document modifications (like macros); shared files are unaffected

How it works

Hush Keys installs a low-level Windows keyboard hook that intercepts keystrokes before Office processes them. When the active window is an Office application, and F1 is pressed, the keystroke is suppressed. Otherwise, it passes through normally. The hook is active only while the app is running.

Downloads

Available on the Microsoft Store. Works in standard and corporate environments.

Get Hush Keys on the Microsoft Store (https://apps.microsoft.com/store/detail/9MVM4J7BMMP4?cid=DevShareMCLPCS)

View source on GitHub (https://github.com/noahmaichel/hush-keys)

FAQ

Who is this for?
Built for people who live in Excel - financial modellers, analysts, anyone doing F2 heavy work. The traditional IB fix is to pop the F1 key off the keyboard; Hush is the software version.

Can I disable other keys too?

Yes. Beyond F1, you can disable other common keys like Insert, Caps Lock, Scroll Lock, and Pause/Break.

Why not just use a VBA macro?
VBA needs to be in every workbook or your personal macro file, doesn't survive corporate-locked-down setups or client sharing, and breaks if macros are disabled. Hush is system-level.

Does it affect files I share with others?
No. Nothing is written in your documents. Spreadsheets and presentations you share are completely unaffected without requiring macros.

Does it affect non-Office applications?
No. By default, the suppression only fires when Excel, Word, PowerPoint, or Outlook is the active window. F1 works normally everywhere else - though you can optionally disable it globally.

Does it run at startup automatically?
Auto-start can be enabled, so Hush is always active when you need it. The app lives in the system tray - out of the way, but always accessible when you want to adjust settings.

Does this require admin rights?
No.

What about Mac?
Not supported, Windows-only.