How Do I Optimize DPC Latency in Windows 8?

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How Do I Optimize DPC Latency in Windows 8?

When Windows 8 is installed and is regularly used to install, uninstall, and execute the applications, it is likely that the operating system starts facing DPC latency after some time. Deferred Procedure Call (DPC) latency is the time taken by the microprocessor to accept and react on the interrupt requests (IRQs). DPC latency is measured in microseconds, and the more the microseconds a device takes to respond to the IRQ, the more increased DPC latency you will experience.

When DPC latency takes place, the symptoms that Windows 8 starts showing are:

[listNum]■The mouse pointer keeps hanging and it starts jumping from one location to another on the screen instead of moving smoothly when users move the mouse.
■The delay in typing the same characters repeatedly using the keyboard is increased which decreases the typing speed.
■Windows 8 starts responding slowly to any command given by the user.

In order to view the DPC latency of each device, a free utility called LatencyMon can be downloaded. This utility only displays the amount of DPC latency for each device that is connected to the computer. However to fix the DPC latency for all the devices that a computer has, administrators must execute a particular command by opening the command line interface with elevated privileges in Windows 8.

How to Fix DPC Latency Issue

To fix DPC latency issue in Windows 8, step-by-step instructions given below must be followed:
    ■Log on to Windows 8 computer with the administrator account.
    ■Click Desktop tile from the Start screen to go the desktop window.
    ■Once on the desktop screen, hover mouse to the bottom right corner.
    ■From the displayed options, click Search.
    ■On the opened Search pane in the right, make sure that Apps category is selected.
    ■On the same pane, type CMD in Apps field.
    ■From the displayed results on Apps window, right-click Command Prompt.
    ■From the displayed advanced options at the bottom of the screen, click Run as administrator.
    ■On the User Account Control confirmation box, click Yes to provide the administrative consents to open the command prompt window with the elevated privileges.
    ■On command prompt window, type BCDEDIT /SET DISABLEDYNAMICTICK YES command and press Enter to fix the high DPC latency in Windows 8.

    ■Once the command executed successfully, close the command prompt window.

Note: In order to check DPC latency in Windows 8 LatencyMon.exe software can be downloaded by copying the following link in the Internet Explorer and press Enter.
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