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1. Installing Drivers

2. Working of Driver
• A device can only function on the basis of its specialized
commands
• Only device driver has knowledge of these commands
• Device driver converts the commands from the
computer to the specialized commands of the device
• Device driver acts as a translation medium between the
device and the operating system of the computer
System Device Driver Device

3. Uses of Drivers
• Updates - Enables updates for a hardware device to
be independent of the operating system
• Troubleshooting - Used in case of a problem with a
hardware device
• Better Performance - Provides for better usage of
the system

4. Viewing Device Drivers and show it practically
of CDROM drive and LAN card
• Users can test the status of a
device driver
• It is also possible to check
whether a driver is installed
for a particular hardware
device
• Driver tab displays the
information related to the
driver installed
Driver Tab

5. Driver Signing
• The Microsoft Windows Hardware Quality Lab
( WHQL ) test program certifies device drivers that
meet a certain standard
• A digital signature is embedded in the device
drivers that pass the WHQL test and these drivers
are called signed drivers
• Updated drivers have to go through testing process
again to get a new digital signature
• There are three options for driver signing Ignore,
Warn and Block

6. Driver Signing
• Automatic installation of a new unsigned device
driver can lead to following problems:
– Installation of inferior drivers – can corrupt
system memory and cause errors in functioning of
system
– Overwriting of system files – leads to
compatibility problems. Devices that use these
files will stop functioning and working of entire
system deteriorate
– Viruses
– Installation of incompatible drivers

7. Complying with HCL
• Microsoft maintains a list of devices that have
passed compatibility test of Microsoft Windows
and are of high quality. This list is known as
Hardware Compatibility List (HCL)
• You can comply with HCL by ensuring that
Microsoft has certified all the devices connected
to your computer
• It is possible to recognize and deal with unsigned
driver files and system files with the help of the
File Signature Verification tool

8. Show sigverif command practically
• Installing the driver using add hardware wizard
• Viewing signed driver from msinfo32

9. How to Become Perfect
• Read and understand the instructional
manual or text file that is supplied with the
driver
• Incorrect installation or updating of drivers
can corrupt the operating system
• Keep in touch with driver manufacturer for
latest updates.
• Search the manufacturer’s web site for
available updated versions of the driver.

10. How to Become Perfect
• It is also useful to check for updated versions of
drivers on websites such as www.driverzone.com,
www.driversguide.com and www.drivershq.com
• Be very cautious in following the instructions when
you are uninstalling a driver

11. Troubleshooting
• Any incorrect operation with respect to hardware
drivers can cause great harm to the system.
• Various problems that may occur are:
– Computer does not Work Properly after Installation of
New Driver
– Computer does not Update a Driver in Memory
– Cannot Download Driver Updates from the Windows
Update Site