Article ID: 2907018 - View products that this article applies to.
Assume that you have a system that has Windows 8.1 installed, and that has an attached touchpad device. Specifically, either a Precision Touchpad (PTP) or a third-party touchpad is attached. When you attempt to use the PTP device immediately after using the keyboard, there is a short delay before you can use the PTP device.
Note Windows 8.1 introduces a feature that is called accidental activation prevention (AAP). AAP helps ensure that unintended taps while you type on an integrated touchpad are suppressed. When this feature is enabled, taps and clicks from an integrated touchpad or pointing stick are suppressed for a while after the last keystroke.
This is expected behavior on systems that are running Windows 8.1, because the default setting for Precision Touchpad is Medium delay.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/322756/ )How to back up and restore the registry in Windows
Suppressed clicks or "click lag" are visible symptoms when you play games or use applications that require simultaneous or low-latency interleaved input from both the keyboard and an integrated pointing device. When you use such applications or games, we recommend that you disable the AAP feature through PC Settings.
To do this, follow these steps:
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To apply this setting for any new user who logs on to the system, follow these steps:
The following are additional values that can be modified within the registry under the PrecisionTouchPad subkey. The settings both use 0 or a non-zero value to control the "off" or "on" status. For consistency, 0xffffffff is used for the non-zero value.
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For more information about using a precision touchpad, go to the following Microsoft website:
Using a precision touchpad