Windows Device Drivers

Device drivers are small files, an operating system for  communication with multiple devices to a computer. Although  direct communication with the hardware, the system sends  messages to a driver of demand, the features of each device,  as it needs. A device driver for its purpose with little or no  input from the user. For example, if a driver is installed, it  is likely that you will never interact with it. It’s very  simple in essence to the operating system.

The Windows operating system default memory for the drivers.  Drivers to fill out entries in the so-called distribution  function table. If the functions of a device are necessary,  refers to the Windows Dispatch table and select the specific  duties as required.

For example, you want with your Canon scanner to an image.  Windows function is based on the table to send code to perform  this function. The system then sends a request to the scanner.  If a driver of an application, it runs into one of three  types:

• It responds to you the function and returns a confirmation  that the task is complete.

• If the device is busy with another mission, the demand and  work in a queue.

• It reports the operating system, there is a problem, and the  market can not be executed.

Most pilots in the so-called kernel mode. The Windows system  will in the nuclei of codes or user mode. Kernel-mode  processes have the ability, directly with the hardware and  storage system. However, user-mode is often used for software  applications. This method allows demand programs and use  services that the operating system, but they can not directly  on the hardware.

Les problèmes avec le pilote de périphérique

As computer programs, drivers and equipment are capable of  many problems. Some of the most common include the instability  of programs, and programs to break down or the computer  itself, in many cases, upgrade or replace a device driver may  resolve the material and software problems.

How to update Windows drivers

Microsoft’s Windows Hardware Quality Lab tests a large number  of device drivers. If a driver of a number of tests, then it  is a digital signature system and Windows. Users can also  install unsigned drivers, depending on the termination of his  computer, the signature level. Signature verification with the  level 0, while the level 1 you can check for digital  signatures and confirmation, if there were not found. However,  you can continue the installation, even in the absence of  signatures of your driver. Level 2 is a parameter, the  installation of all devices that have not signed by Microsoft.

To check by a device driver, access to the “Start” menu, click  “Run” and type “sigverif” in the command line. This command  performs an analysis of device drivers on your computer and  looking for those unsigned.