certain character cannot be inputed

Question

certain character is not written when I press the certain key to write some texts.

Answer 1

Dear 세민 이,

Thank you for posting your question on the Microsoft Q&A forum.

Based on your description, it appears that certain characters do not appear when typing. Could you please confirm which application(s) you are experiencing this issue in? Is the issue occurring across the entire system or only in specific apps?

Additionally, have you tried resetting the keyboard settings on your computer?

• Open Start and select "Settings > Time & Language > Language";
• Under "Preferred languages", select the configured language and click on "Options";
• Under "Keyboards", select "Add a keyboard";
• Select the keyboard layout for the keyboard you have.

I look forward to hearing back from you.

---

If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Answer 2

In Microsoft 365 apps on Windows, missing or incorrect characters when pressing certain keys are typically caused either by a known product issue with specific characters, or by the wrong keyboard/input method being active.

Based on the described behavior (“certain character is not written when I press the certain key”), use these steps:

1. Verify the issue is not hardware
   • Test the same key in other apps such as Notepad or Word.
   • If the key also fails intermittently there, clean the keyboard (debris under keys can cause intermittent issues) and, if possible, test with an external keyboard.
2. Check keyboard layout and language
   • In Windows, open Settings → Time & language → Language & region.
   • Ensure the correct language/keyboard layout is selected (for example, the appropriate regional layout for the language being typed).
   • If the layout looks wrong or corrupted, add the correct keyboard layout, move it to the top, then remove the problematic one and sign out/sign in again so the new layout is fully applied.
3. If using IME (Input Method Editor)
   • If an IME is enabled (for example for East Asian languages) and characters appear in the wrong form after certain symbols (such as @), revert to a previous version of the IME using the documented steps in Revert to a previous version of an IME (Input Method Editor).
4. If the missing characters are accented or special characters
   • Some older Microsoft products had confirmed issues where certain accented or special characters (for example, characters requiring AltGr or dead keys) could not be entered in specific text fields.
   • When this is the case, the resolution is to install the latest updates for the affected product via Microsoft Update, because these issues were fixed in later cumulative updates.

If the problem only occurs in one Office app (for example, only in PowerPoint but not in Word), and only for specific characters, ensure Office is fully updated from within any Office app (File → Account → Update Options → Update Now), then restart Windows and test again.

---

References:

• Characters are displayed as SBC (Single Byte Character Set) after using the "@" symbol when IME (Input Method Editor) is turned on
• Keyboard Input (Get Started with Win32 and C++)
• Certain Spanish characters cannot be entered in text fields
• Can't enter accented characters that require dead keys in Internet Explorer 11
• A user cannot use the Alt Gr key to type special characters in Lync 2010 Group Chat
• How to reset my keyboard? Combination of "Alt + L " gives weird characters and message is sent automatically. - Microsoft Q&A
• keypad issue - Microsoft Q&A
• shift key in Word not working - I have to press the key several times to be able to capitalize a letter. - Microsoft Q&A