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Windows Keyboard Test — Check All 104 Keys

Test a full-size Windows keyboard on a matching 104-key layout, from the Windows key and function row through to the numpad and navigation cluster.

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Live Key Display
Tested0/104Presses0Max Simultaneous0Progress0%
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Event Inspector

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Health Summary
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Keys Tested0 / 104
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Total Presses

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Max Rollover

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Testing a Windows keyboard, and reading what the result tells you

A full-size Windows keyboard is 104 keys in the American ANSI arrangement or 105 in the European ISO one. The difference is small but worth knowing when a key looks unaccounted for: ISO boards add an extra key beside the left Shift and use a tall L-shaped Enter, which shortens the backslash key and moves it up a row. Beyond that they share the same four regions — the typing cluster, the function row, the navigation block, and the 17-key numeric keypad.

The keys that only exist on Windows layouts are the ones this page is most useful for. Both Windows keys are captured here without the Start menu opening, so you can confirm the switches work. The Context Menu key between right Alt and right Control — the one most people never press — registers as its own code. And on European layouts, right Alt is AltGr, which Windows reports as Control and Alt together; the inspector shows both flags set, which is how you confirm it is behaving correctly rather than sticking.

The single most useful habit when reading the results is watching two fields in the inspector. code is the physical position on the board and never changes with your language settings. key is the character that position produces under the layout Windows currently has active. When those two disagree in a way you did not expect — you press the key next to Enter and get a different symbol than the legend shows — the keyboard is fine and your active layout is not the one printed on the keycaps. That is a settings problem, and it is one of the most common reasons people arrive here convinced their keyboard is broken.

Work through every region rather than the keys you suspect. A single dead key and a whole dead row point at different causes, and you cannot see the pattern without covering the board. If you are on a laptop, the laptop keyboard test uses a compact layout that matches yours more closely, and the numpad test isolates the keypad along with live Num Lock state if that is the part giving you trouble.

Key Capabilities & Features

Full 104-Key ANSI Layout

Typing cluster, function row, navigation block and dedicated numpad, all mapped to their real positions.

Windows Key Captured Safely

Both left and right Windows keys register here without opening the Start menu or losing your place.

Context Menu Key

The application key between right Alt and right Control is tested as its own key rather than ignored.

AltGr Verification

Shows the combined Control and Alt flags that Windows sends for right Alt on European layouts, so you can confirm it is working.

Code and Key Side by Side

The inspector shows the physical position and the character it produced, which is how layout mismatches become obvious.

Health Summary

Tracks the percentage of keys confirmed, peak simultaneous presses and total keystrokes across the session.

How to Perform This Test

  1. Function row: Escape through F12, then Print Screen, Scroll Lock and Pause/Break. Print Screen often reports only on release — that is Windows, not a fault.
  2. Navigation block: Insert, Home, Page Up, Delete, End, Page Down, then all four arrow keys.
  3. Numpad: press Num Lock first and confirm it toggles, then work through 0 to 9, the decimal point, slash, asterisk, minus, plus and the numpad Enter.
  4. Modifiers: left and right Control, left and right Shift, left Alt, right Alt or AltGr, both Windows keys, and the Context Menu key.
  5. Typing cluster: type through A to Z and every punctuation key. Watch the character in the inspector, not just the highlight.
  6. Read the health summary: it should reach 100 percent of the layout. Anything still dark is either missing from your physical board or genuinely not reporting.

Troubleshooting Common Hardware Issues

  • The numpad types arrows instead of numbers: Num Lock is off. Press it once. If nothing changes, some laptops need Fn + Num Lock, and a few Windows power settings restore Num Lock off on every boot.
  • The Windows key does nothing: gaming keyboards commonly have a Win Lock or game mode that disables it deliberately, usually Fn + Windows or a dedicated switch. Windows itself can also disable it through a registry policy applied by some gaming utilities.
  • Keys produce the wrong characters — quotes where the at sign should be: your active keyboard layout does not match your physical keyboard, almost always US versus UK. Press Win + Space to cycle layouts, or set the right one in Settings › Time & language › Language & region.
  • Brief presses are being ignored, or held keys do not repeat: check Filter Keys under Settings › Accessibility › Keyboard. It ignores short and repeated keystrokes by design, and it can be switched on accidentally by holding right Shift for eight seconds.
  • A modifier appears to latch on by itself: that is Sticky Keys, toggled by pressing Shift five times in a row. Turn it off in the same Accessibility › Keyboard panel.
  • A whole row or column is dead: that pattern is the keyboard matrix, not individual switches. On a desktop board it usually means the controller or a trace; on a laptop it is most often the ribbon cable. Either way the fault is not in the keys themselves.
  • Nothing registers at all: try a different USB port, avoiding hubs and KVM switches. If the board works in the BIOS but not in Windows, uninstall the keyboard under Device Manager and reboot — Windows reinstalls the driver on the next start.

Windows features that make a working keyboard look broken

Before assuming hardware, rule these out. Every one of them produces symptoms people routinely mistake for a failing keyboard, and each is a single setting.

FeatureWhat you seeHow it gets switched on
Filter KeysQuick taps are ignored; held keys stop repeating.Holding right Shift for eight seconds.
Sticky KeysShift, Control or Alt behave as though latched.Pressing Shift five times in a row.
Toggle KeysA tone plays on Caps Lock, Num Lock or Scroll Lock.Holding Num Lock for five seconds.
Wrong active layoutCorrect keys, wrong characters — @ and " swapped.Win + Space, or a second language added to Settings.
Win Lock / game modeThe Windows key does nothing at all.Fn + Windows, a hardware switch, or gaming software.
Snipping Tool bindingPrint Screen opens a capture overlay.Default in Windows 11 under Accessibility › Keyboard.

What the pattern of failure tells you

One key dead, everything else fine. Almost always physical and often fixable. Debris under the cap, a worn contact, or a single failed switch. On a mechanical board this is a switch replacement; on a membrane board it usually means the whole keyboard. Clean first — it works more often than people expect.

A row or a column dead. The keys share a trace in the matrix, so the break is in the trace or the connector rather than in the keys. On a laptop, suspect the ribbon cable to the mainboard, which flexes every time the lid moves. This pattern is diagnostic: it rules out the switches entirely.

Scattered keys dead with no pattern. Usually liquid. Sugary drinks are worse than water because the residue keeps conducting after the liquid dries. If a spill happened, the fault will not resolve itself.

Keys register twice from one press. Not a dead key at all — that is switch chatter, and it has its own measurement. The double typing test shows the millisecond gap that proves it.

Keys drop only when several are held. Also not a fault. That is the keyboard matrix reaching its limit, which the ghosting test and the rollover test measure properly.

Frequently Asked Questions

Can I test the Windows key without opening the Start menu?
Yes. The page cancels the default action on the Meta keydown, so both the left and right Windows keys register in the layout above without the Start menu appearing. If a Windows key does not register at all, the usual cause is a Win Lock or game mode on gaming keyboards rather than a broken switch.
Does this work with a TKL, 75% or 60% keyboard?
Yes. The layout shown is a full 104-key board, so a smaller keyboard simply leaves the keys it does not have untested — the health summary will stop short of 100 percent and that is expected, not a fault. Every key your board does have will register correctly.
What is the Context Menu key?
The key between right Alt and right Control on most full-size Windows keyboards, marked with a small menu icon. It opens the same context menu as a right-click, applied to whatever currently has focus. It reports as its own key code and is genuinely useful for keyboard-only navigation, which is why it is worth confirming it works.
How do I test AltGr on a European keyboard?
Press right Alt and watch the inspector: on a layout with AltGr, Windows reports it as Control and Alt together, so both flags light up from one key. That combined signal is correct behaviour rather than a stuck modifier. Try AltGr with a letter afterwards to confirm the alternate character actually appears.
Why does my keyboard type the wrong characters?
Because the layout Windows has active does not match the keyboard in front of you — US and UK are the pair that catches people, since they swap the at sign and the double quote. The keys and the switches are fine. Press Win + Space to cycle between installed layouts, or set the correct one under Settings › Time & language › Language & region.
Why are my quick keypresses being ignored?
Check Filter Keys in Settings › Accessibility › Keyboard. It is an accessibility feature that deliberately ignores brief and repeated keystrokes, and it can be enabled by accident just by holding the right Shift key for eight seconds. It produces exactly the symptom of a keyboard that misses presses.
My numpad types arrows instead of numbers. Why?
Num Lock is off, which switches the keypad to its secondary navigation functions — that is what the arrow legends on the number keys are for. Press Num Lock once. On some laptops the toggle is Fn + Num Lock, and certain power settings restore it to off on every boot.
A whole row of keys stopped working. Is the keyboard finished?
Not necessarily, but the fault is not in the keys. Keys in a row share a trace in the keyboard matrix, so a whole row failing points to that trace, the controller, or the connector. On a laptop the most common cause is the ribbon cable, which flexes every time the lid opens and is often replaceable on its own.

Related Tools

⌨️Full Keyboard Test⌘Mac Keyboard Test💻Laptop Keyboard🔢Numpad Test🔧Function Keys👻Ghosting Test