If ALT codes are not working on your Windows 11/10 PC, here are some suggestions that will help you fix the issue. ALT codes are used to enter special characters and symbols on your PC. These are combinations of the ALT key and numeric keys. A specific ALT ad numeric key combination is used to enter a specific special character. But, some users cannot use ALT codes on their computers. This issue might be caused due to your configured settings or a certain app interfering with your keyboard shortcuts. It might also be caused due to a Registry entry preventing you from using ALT codes.

Fix ALT Codes not working in Windows 11/10

If ALT codes are not working on your Windows 11/10 PC, we recommend you check your keyboard, clean its keys, and ensure it is working fine and properly connected. You can then use the following methods to fix this issue:

1. Switch on Mouse Keys while Num Lock is enabled.
2. Modify the Registry to activate all Unicode characters.
3. Uninstall the problematic app.
4. Switch to another Keyboard Layout.
5. Use Character Map to enter ALT codes.
6. Troubleshoot in a clean boot state.

1] Switch on Mouse Keys while Num Lock is enabled

To fix the issue, enable Mouse Keys when NUM LOCK is ON. To do that, press the left ALT + left SHIFT + NUM LOCK key combination on your keyboard. After that,  press the Yes button on the prompted dialog. You can also do the same using your Windows Settings. Here are the steps to do that:

1. First, open the Settings app using Win+I and click on the Accessibility tab from the left pane.
2. Now, from the right-side pane, select the Mouse option under the Interaction section.
3. After that, enable the toggle associated with the Mouse keys option.
4. Next, tick the Only use mouse keys when Num lock is on the checkbox.

Once done, you can try using the ALT codes and see if the problem is fixed or not. If not, you can play the next fix to resolve this issue.

See: Fix Win+Shift+S keyboard shortcut is not working in Windows.

2] Modify the Registry to activate all Unicode characters

The ALT codes might not work on your PC if a Registry entry stops you from entering Unicode characters. So, if the scenario is applicable, you can try modifying your Registry to enable all Unicode characters.

However, before using this method, we suggest you backup your Registry. If you make a wrong change by mistake, it can damage your system severely.

Now, to change your Registry, follow the below steps:

1. First, open your Registry Editor app and navigate to the below location:

   HKEY_CURRENT_USER\Control Panel\Input Method

2. Now, right-click on the Input Method key, and from the context menu, choose the New > String Value option.
3. After that, name the newly created key as EnableHexNumpad and save it.
4. Next, right-click on the EnableHexNumpad key from the right-side pane, and select the Modify option.
5. In the opened pop-up, set its Value data to 1 and click on the OK button to save changes.
6. When done, reboot your PC to let the changes take effect, and then retry using the ALT codes.

Hopefully, you will not be able to use ALT codes. But if the problem persists, you can apply the next fix.

Read: Keyboard opening shortcuts instead of typing letters in Windows.

3] Uninstall the problematic app

There might be a third-party app that is causing the issue at hand. If you have recently installed a third-party app after which you are experiencing this issue, you can uninstall the problematic app to fix the issue. Also, you can try closing the background apps and then analyze which app is causing the problem. You can then remove the interfering app from your computer.

To do that, open Settings and go to Apps > Installed apps. After that, select the problematic program and click on the three-dot menu button. Then, choose the Uninstall option and follow the prompted instructions. Once done, try using ALT codes and see if the issue is fixed.

4] Switch to another Keyboard Layout

You can also change your current keyboard layout to a different one and see if the problem is resolved or not. To do that, you can try the following steps:

• First, launch the Settings app and go to the Time & language tab.
• Now, click on the Language & region option and select a different keyboard layout under the Keyboards section.

After doing so, check whether you can use the ALT codes on your PC.

5] Use Character Map to enter ALT codes

You can also use the Character Map to add ALT codes. To use it, first, open the Run dialog using Win+R and enter charmap in the Open field. This will open up the Character Map window on your PC. You can now click on the special characters you want to use and then press the Select button to copy it to the clipboard. Later, you can paste the copied characters wherever you want to use them.

Read: Ctrl+C and Ctrl+V not working in Windows.

6] Troubleshoot in a clean boot state

You can also try performing a clean boot and then check if the issue is resolved. It might be the case that you are dealing with this problem because of a conflict with a third-party app or service. In a clean boot state, your computer will start with only a set of essential Microsoft Services and drivers. So, perform a clean boot and then see if you can use ALT codes or not.

Here’s how to do that:

1. First, hit the Win+R key combination to open the Run command box.
2. In the Open field, type and enter msconfig to launch the System Configuration window.
3. Now, you need to navigate to the Services tab and tick the checkbox called Hide all Microsoft services. This will ensure that you don’t turn off important Microsoft services.
4. After that, click on the Disable all button and it will disable all the third-party services.
5. Next, move to the Startup tab, tap on the Open Task Manager button, and turn off the startup programs in your Task Manager.
6. Then, go back to the System Configuration window and press the OK button, and restart your computer.
7. Once your computer is rebooted, you can try using ALT codes and see if the problem is resolved.

If you are able to use ALT codes in a clean boot state, you can start enabling services one by one, and check which one is causing the issue at hand. Once you find that out, uninstall the problematic app from your computer.

Why is Alt-Tab not working in Windows 11?

Alt-Tab is a shortcut key used to switch from one window to another. If Alt+Tab is not working, make sure your keyboard is in proper working condition and is properly connected to your computer. It might also not work due to configured settings on your PC or corrupted/ outdated keyboard drivers. Besides that, other reasons for the same could be disabled Windows hotkeys, virus infection, outdated Windows, and corrupted system files.

How do I fix Quick Settings in Windows 11?

If the Quick Settings are not working on your Windows 11/10 PC, you can perform an SFC scan followed by a DISM scan to fix the corrupted system files that might be causing this issue. You can also try re-registering the Action Center using Windows PowerShell. You can also modify your system registry or troubleshoot the problem in a clean boot state.

Now read: Keyboard shortcuts and Hotkeys are not working in Windows.