If “specific key does not work” repeatedly, it is better to narrow the scope to key switch/membrane issues, key mapping, and language settings rather than changing multiple settings at once. Compare with other ports and other PCs to distinguish between problems with the keyboard itself and problems with Windows input settings and drivers.
Solving Order
We've organized the methods starting with the simplest and least expensive ones. Please check the solutions one by one, starting from the top.
Please check them in order from the top. If the issue is resolved, you do not need to proceed to the next step.
First rule out connection/port issues.
confirmation point
After these steps, see if the “specific key not working” symptom decreases or disappears. If there is no change, check for possible key switch/membrane problems in the next step.
Distinguish whether it is a Windows input issue or a physical keyboard issue.
Some keystroke errors may be due to accessibility, language, or repeat rate settings.
Outdated or corrupted keyboard/HID drivers may be causing the symptom.
If only a specific key fails or is pressed twice, there is a high possibility of a switch/membrane problem.
We've put together a list of things we frequently check regarding this issue.
If the symptoms do not match exactly, please check the issue below.
When troubleshooting no keyboard input at all, it is important to rule out the causes one at a time. Based on the “Keyboard not working” symptom, check the USB/Bluetooth connection and driver and proceed to the next step. Compare with other ports and other PCs to distinguish between problems with the keyboard itself and problems with Windows input settings and drivers.
If “entering the keyboard twice” is repeated, it is better to narrow down the switch chattering and repeat speed settings rather than changing several settings at once. Compare with other ports and other PCs to distinguish between problems with the keyboard itself and problems with Windows input settings and drivers.
This guide is designed to categorize port physical damage and front panel cable topics in a safe order for “one USB port missing” situations. Cross-test devices, cables, and USB ports and check for power management and driver issues.
If “mouse not working” repeats, it is better to narrow it down to USB/Bluetooth connection, sensor, or battery rather than changing several settings at once. Divide the problem into the mouse hardware and PC side by testing sensors, batteries, wireless connections, and other ports.
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