Laptop "Keyboard" Typing Multiple Letters
4.5
You press a key once, but it types the letter twice (e.g., "Hhello").
Symptoms
- Double letters
- Chattering
- Repeating keys
Possible Causes
- Dust under keycap
- Software "Filter Keys" setting
- Failing switch
Step-by-Step Fix
1
Clean with Compressed Air
Blow air under the affected key while holding the laptop at an angle.
2
Disable "Filter Keys"
Settings > Accessibility > Keyboard > Ensure "Filter Keys" is OFF.
3
Use "Keyboard Chattering Fix" Software
A small app that ignores rapid duplicate keypresses.
When to See a Technician
This is common on "Butterfly" keyboards; a single speck of dust can cause the switch to bounce twice.
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