Registry Home > Hardware > Mice and Keyboards

Change the Keyboard Buffer Size (Windows NT/2000/XP)

Occasionally Windows may report an error relating to an overflow in the keyboard buffer. This tweak can be used to increase the size of the buffer, and avoid this problem.

This tweak can be easily applied using WinGuides Tweak Manager.
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Open your registry and find the key below.

Modify the value of 'KeyboardDataQueueSize' to equal the size of the queue buffer to use, .

Exit your registry and restart Windows for the change to take effect.

Registry Editor Example
|NameTypeData|
|(Default)REG_SZ(value not set)|
|KeyboardDataQueueSizeREG_DWORD0x00000064 (100)|
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|HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Kbdclas...|
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Registry Settings
System Key: [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Kbdclass\Parameters]
Value Name: KeyboardDataQueueSize
Data Type: REG_DWORD (DWORD Value)

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Disclaimer: Modifying the registry can cause serious problems that may require you to reinstall your operating system. We cannot guarantee that problems resulting from modifications to the registry can be solved. Use the information provided at your own risk.

Last modified: May 13, 2002