Dell Pro Keyboard and Mouse KM5221W Keys are Repeating
Summary: This article describes what to do when keys in the Dell Pro Keyboard and Mouse KM5221W keyboard start to repeat by themselves.
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This article is not tied to any specific product.
Not all product versions are identified in this article.
Symptoms
You may notice with the Dell Pro Keyboard and Mouse KM5221W that the keys in the keyboard start to repeat by themselves.
The issue can happen on any keys. For example, when you are trying to type "English" on the keyboard, it starts to write "EEEEglish" or "Ennnngliiiishhhhh."
The issue is seen when the keyboard has been used for a certain period.
Affected Device:
- Dell Pro Keyboard and Mouse KM5221W
Cause
This is an industry-wide behavior that occurs when a wireless mouse/keyboard receiver dongle is at a close distance to a USB 3.0 port, cable, or device. The 2.4GHz ISM band is a widely used unlicensed radio frequency band for devices such as wireless routers, and wireless mouses or keyboards. USB 3.0 can operate in the 2.4 GHz~2.5 GHz range, and the noise that is emitted can disrupt nearby transmitters. If the wireless mouse/keyboard receiver dongle is placed near a USB 3.0 radiation channel, it can pick up broadband noise. This noise can limit the sensitivity or receptiveness of the wireless receiver. Also, a close-range WiFi router may add a coupling effect. This effect can further strengthen the interference to the wireless mouse/keyboard receiver dongle.
Note: See the INTPW article for more information.
Resolution
Follow the steps to resolve the issue:
- Go to Dell Pro Keyboard and Mouse KM5221W Driver's Page and install Dell Display and Peripheral Manager (DDPM). Ensure that the dongle, keyboard, and mouse firmware are updated automatically in the application
- If DDPM does not update the firmware automatically, update the dongle, keyboard, and mouse firmware manually from Dell Pro Keyboard and Mouse KM5221W Driver's Page.
To download and install the firmware, refer to How to Download and Install Dell Drivers and Firmware.
Affected Products
Alienware, Dell All-in-One, Dell Pro All-in-One, Dell Pro Max Micro, Dell Pro Max Slim, Dell Pro Max Tower, Dell Pro Micro, Dell Pro Slim, Dell Pro Tower, Dell Slim, Dell Tower, Inspiron, OptiPlex, Vostro, XPS, G Series, Chromebook, G Series
, Alienware, Dell Plus, Dell Pro, Dell Pro Max, Dell Pro Plus, Dell Pro Premium, Inspiron, Latitude, Dell Pro Rugged, Vostro, XPS, Fixed Workstations, Mobile Workstations, Dell Pro Max Micro XE FCM2250, Dell Pro Max Slim XE FCS1250, Dell Pro Max Tower T2 XE FCT2250, Dell Pro Max 16 XE MC16250, Dell Pro Micro Plus XE QBM1250, Dell Pro Slim Plus XE5 QBS1250, Dell Pro Tower Plus XE5 QBT1250, Dell Pro Keyboard and Mouse KM5221W
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Article Properties
Article Number: 000216039
Article Type: Solution
Last Modified: 08 Nov 2025
Version: 9
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