You press the “ç” key and a semicolon appears. You press the quotation mark key and an accent appears. Or, worse, you press a letter on the right side of the keyboard and a number appears. If this is happening, the keyboard isn't broken: it's malfunctioning. misconfigured. In the vast majority of cases, the problem lies in the language settings, layout, or the Num Lock key being accidentally activated—and all of these can be resolved in a few minutes, without installing anything.
This guide shows, in order, what to check: first, the simple and unrelated causes, then the physical ones, and finally, the cases where the problem is actually hardware-related. At the end, there is also a section for those who have the same type of problem on their cell phone, where the causes are different.
What you will find in this guide
- How to identify which of the three common problems is yours.
- How to disable Num Lock on keyboards with and without the visible key
- How to use the virtual keyboard Windows fails when the physical server doesn't comply.
- How to check and correct the language and layout (ABNT2) in Windows 10 and 11.
- When the problem is physical, what should be done in that case?
- What to do when the keyboard on your cell phone is malfunctioning?
Identifying the keyboard problem
Before changing any settings, note which It's the symptom. Each one points to a different cause, and that saves time.
Symptom 1: Letters turn into numbers
You type "july" and it comes out as "j5678". This is a classic case of... Num Lock On laptops. Many laptops without a separate numeric keypad hide a numeric keypad within the letters on the right side (usually the U, I, O, J, K, L, M keys and their neighbors). When Num Lock is activated — often unintentionally, by a shortcut — these letters start producing numbers.
Symptom 2: accents, “ç” and symbols are misspelled
You press the “ç” key and a semicolon appears; the quotation mark key returns a different character; the at symbol is in a different place. The problem here is... layoutWindows is treating your keyboard as if it were American (US standard) instead of Brazilian (ABNT2). This is the most common cause after a system update or reinstallation.
Symptom 3: A specific key does not respond or repeats.
If all other keys are working correctly and only one fails, repeats on its own, or requires force, the problem is likely physical—dirt, liquid residue, or wear. In this case, no configuration will solve the problem; skip to the physical verification section.
Disabling Num Lock on a physical keyboard
If your symptom is number 1, the fix is usually a simple keystroke.
Locating the Num Lock key
On full desktop keyboards, the key is located just above the numeric keypad on the right, with the name Num Lock or NumLk, There's usually a light indicating if it's on. Press it once and test the typing. If the light goes out and the letters return to normal, the problem is solved.
Using Fn + Num Lock on laptops
On compact laptops, the function is usually printed in a different color on another key — often the F11, The Scroll Lock, The Insert or the key itself Num Lk in the corner. Hold down the key Fn and press that key. If the manufacturer is Dell, HP, Lenovo, Acer, or Samsung, the exact combination varies; the tip is to look for the same design or color as the "Fn" lettering printed on the keyboard.
If nothing happens, some models use Fn + Shift + Num Lk. And, as a last resort, it's possible to disable Num Lock using the virtual keyboard, as we show below.
Disabling Num Lock using the virtual keyboard
The Windows virtual keyboard is an on-screen copy of the keyboard, controlled by the mouse. It's useful precisely when the physical keyboard isn't cooperating.
Opening the virtual keyboard in Windows
The fastest way works in both versions: press the keys Windows + Ctrl + O. If you prefer the menu, go to Settings and then in Accessibility (called “Ease of Access” in Windows 10), open the section Keyboard and activate the option Virtual Keyboard.
Displaying the numeric block
With the virtual keyboard open, click on Options and check the box Activate numeric keypad. The block of numbers appears on the right side of the window.
Turning off Num Lock
Click the key NumLock This block functions like a switch: if it was on, it turns off. Test typing on the physical keyboard immediately afterward. Once resolved, you can close the virtual keyboard normally.
Checking the language and keyboard layout
If your symptom is number 2 — incorrect accents and “ç” — the problem lies in the layout. It's worth understanding the difference between two concepts that Windows treats separately: the display language (the language of menus) and the keyboard layout (The map shows which key produces which character). You can have Windows in Portuguese and still have the American layout active.
In Brazil, keyboards sold with their own "ç" key follow the standard. ABNT2. Imported keyboards, even those with the Portuguese operating system, are usually of the US International standard. Choosing the wrong layout is what causes quotation marks to become accents and the "ç" to disappear.
Rule of thumb: if your keyboard has the “ç” key engraved on it, choose ABNT2. If not, choose “Portuguese (Brazil) — United States International”.
How to change the language and layout in Windows 10 and 11
Step by step
1. Open Settings: Click the Start menu and choose Settings (or press Windows + I).
2. Go to “Time and language”: then open the section Language and region.
3. Locate the Portuguese (Brazil) language: Click on the three dots next to it and choose Language options.
4. Adjust the installed keyboards: In the list of keyboards, add Portuguese (Brazil) ABNT2 If it's not there, remove the layouts you don't use — especially "United States - QWERTY," which is often the culprit for taking over on its own.
5. Test: Open Notepad and type ç, ~, ^ and the quotation marks. If they come out correctly, the problem is solved.
The shortcut that causes the problem.
One detail that resolves many recurring issues: when more than one layout is installed, Windows switches between them with... Left Alt + Shift or Windows + Spacebar. It's extremely easy to accidentally trigger this while typing. If the keyboard "misconfigures itself" from time to time, it's almost always this — and the definitive solution is to have only one layout installed.
Adding a new keyboard layout
If you use more than one language daily, maintaining two layouts makes sense. In that case, learn the shortcut to switch instead of removing it, and observe the language indicator that appears next to the clock in the taskbar: it shows which layout is currently active.
ABNT and ABNT2: what is the difference?
ABNT2 is the evolution of the ABNT standard and is what virtually every Brazilian keyboard uses today. It features a separate “ç” key, acute, grave, circumflex, and tilde accents on their own keys, and an extra key next to the right Shift key with the slash and question mark. When choosing the layout in Windows, search specifically for “ABNT2”.
Checking and correcting physical problems.
If the settings are correct and the problem persists, it's time to look at the hardware.
Cleaning and inspecting
Turn off your computer before cleaning. Use a slightly damp microfiber cloth—never soaking wet—and short bursts of compressed air, holding the can vertically, to remove dust between the keys. If sugary liquid has been spilled, home cleaning rarely solves the problem: the residue sticks to the internal contacts, and the issue requires technical assistance.
Testing on another device
With an external keyboard, the test is straightforward: connect it to another computer. If the problem follows the keyboard, it's the keyboard. If it doesn't, it's the computer. On laptops, do the opposite: connect a USB keyboard and see if the typing is correct—if it is, the internal keyboard is the problem.
Using an external keyboard as a temporary solution
While the main keyboard is being repaired, an external USB or Bluetooth keyboard will do the trick. Most are plug-and-play and require no installation. When buying, check if the model is ABNT2 — cheap imported keyboards often come without the “ç” key, and you'll end up with the same kind of headache, only now a physical one.
Keep in mind that when you connect an external keyboard, Windows may apply the previously selected layout to it. If the characters appear incorrectly on the new keyboard, redo the layout adjustment described above.
Checking for driver problems
Keyboard drivers are rarely the cause of swapped characters—it's almost always a layout issue. But if your keyboard has completely stopped responding after an update, it's worth checking.
Updating the driver through Windows
Right-click on the Start menu and choose Device Manager. Expand Keyboards, Right-click on the device and choose Update driver. If that doesn't solve it, choose Uninstall device and restart your computer: Windows will automatically reinstall the default driver at startup.
Where to download drivers safely
Here's an important warning. Avoid programs that promise to "automatically update all drivers." Many of these installers are classified as unwanted software: they display exaggerated alerts about supposed problems, install extras without warning, and charge a subscription to fix something that Windows does for free.
If you need a specific driver, download it only from two sources: the Windows Update (in Settings, in the Windows Update section, also checking for optional updates) or the manufacturer's official website From your notebook or motherboard, look for the exact model of the device.
Conflicts after system updates
Large Windows updates sometimes reorder installed languages and reactivate removed layouts. If your keyboard becomes misconfigured right after an update, the first step is to restart your computer—this resolves many issues, as partially loaded components return to normal.
If the problem persists, re-check the layout: it's common for the update to reinstall the "United States" layout and place it first in the list. As a last resort, Windows allows you to restore the system to a previous point in Settings, under Recovery — but only use this if nothing else works, because programs installed after that point may be removed.
And what if the keyboard that's malfunctioning is the one on your cell phone?
On mobile phones, the causes are different because the keyboard is an app. If the spell checker has started to change words, if accents have disappeared, or if the layout has suddenly changed, check in this order:
- Keyboard language: On Android, go to Settings > System > Languages & input > Virtual keyboard and check if Brazilian Portuguese is enabled. On iPhone, the path is Settings > General > Keyboard > Keyboards.
- Standard keyboard replaced: Installing a new app may have changed the active keyboard. Switch back to your preferred keyboard on the same screen.
- Biased dictionary: If the spell checker insists on misspelling words, use the option to reset the learned dictionary, available in the keyboard settings.
- Keyboard freezing or disappearing: Clearing the keyboard app's cache in the app's information usually solves the problem.
One extra precaution is needed for mobile phones: only install keyboards from known developers and downloaded from the official store. A keyboard sees everything you type, including passwords and banking information — it's not the type of app to try blindly.
Maintenance to prevent future problems.
Periodic cleaning
Cleaning every two or three months prevents most physical malfunctions. A slightly damp microfiber cloth on the key surfaces and compressed air between them will do the trick. Avoid eating over the keyboard: crumbs and sugary residue are the main causes of stuck keys.
Connection check
On wired keyboards, check that the cable is secure and without any sharp bends near the connector. On wireless keyboards, intermittent malfunctions are almost always due to a weak battery or the USB receiver being too far away — replacing the battery and moving the receiver closer resolves most cases of "disappearing letters".
Frequently asked questions
My keyboard is typing numbers instead of letters. What is it?
This means Num Lock is activated. On laptops, press Fn along with the key that has the words Num Lk (or NumLock) printed in a different color. If you can't find the key, use the Windows virtual keyboard and click NumLock there.
The letter “ç” disappeared and the quotation marks became accents. How to fix this?
The keyboard layout is set to American. Go to Settings > Time & Language > Language & Region, open the Portuguese (Brazil) options and select the layout. ABNT2, removing the “United States – QWERTY” layout from the list.
My keyboard gets misconfigured on its own from time to time. Why?
You probably have more than one layout installed and are accidentally triggering the shortcut to switch between layouts (Left Alt + Shift or Windows + Spacebar). Leave only the layout you use and the problem will not return.
Do I need to install any program to fix it?
No. All the fixes in this guide are done using features that already come with Windows. Be wary of programs that promise to "fix your keyboard" or "update all drivers": they are not necessary, and many are classified as unwanted software.
When should I take it in for repairs?
When specific keys don't respond even after cleaning, when there has been a liquid spill, or when a USB keyboard works normally on the same computer while the laptop's internal keyboard continues to malfunction. In these cases, the defect is physical and there is no configuration that will fix it.
Conclusion
Most of the time, a misconfigured keyboard is a two-minute problem: Num Lock is on or the American layout is the wrong one instead of the ABNT2 standard. Always start there, test it in Notepad, and only then move on to drivers, cleaning, and technical assistance.
If this guide didn't resolve your issue, describe the exact symptom—which keys are malfunctioning and what appears in their place—and contact the device manufacturer's support team. This description usually shortens the service time considerably.
