how to integrate barcode scanner into java application FIGURE 5-1 The Driver tab from the device s Properties dialog box in Windows in Software

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FIGURE 5-1 The Driver tab from the device s Properties dialog box in Windows
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Lab Exercise 501: Installing Expansion Cards
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FIGURE 5-2 Accessing the Windows Update site
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If your working PC is not connected to the Internet, or if the device does not have a signed driver available on the Windows Update site, you will have to follow these instructions before clicking Update Driver Using a computer with Internet access, nd and connect to the manufacturer s Web site Using the model number of the device, locate and download the correct driver for the operating system on the PC where the device is installed Save the driver to a oppy disk or Universal Serial Bus (USB) thumb drive, remove the oppy or thumb drive from that system, and insert it into your working PC Open Device Manager and select View device by type Locate the device that matches the expansion card you have installed, and open its Properties dialog box Select the Driver tab, and then click Update Driver When prompted to connect to the Internet, choose No, not this time, and follow the directions to locate and load the new device driver (see Figure 5-3)
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FIGURE 5-3 The Hardware Update Wizard nding device drivers on removable media
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5: Installing Internal Devices
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Many manufacturers include installation wizards for their devices, so this is yet another method that may be used to update device drivers Many times, the manufacturer will include related applications along with the drivers to enhance the performance of the device A good example of this is an inkjet printer that includes the driver and utilities for adjusting print quality, performing printer maintenance, and so on
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Lab Exercise 502: Using Driver Rollback
Increasing the performance of your PC through the installation of expansion cards (sound cards, video cards, wireless networking, Bluetooth devices, etc) is easier than it has ever been Assuming, of course, that you re starting with compatible hardware, Windows XP will detect the new device and install the correct driver with little prompting Often, Windows already has a usable driver and will install it without any action on your part To achieve increased performance, usually it is just a matter of updating the driver via the Internet If the driver turns out to be corrupted or not compatible with Windows XP, using driver rollback can usually get you back up and running
A new driver may cause unexpected problems with your operating system Because of this, Windows XP introduced a feature that enables you to roll back to the previous (working) driver if something should go wrong with a driver update In this exercise, you ll look at the properties of a device, update the driver, and implement driver rollback
Learning Objectives
Updating and repairing device drivers is one of the basic skills required when working with expansion cards The following lab exercise walks you through the process At the end of this lab, you ll be able to Update a device driver in Windows XP Roll back to a previously working driver in Windows XP
Lab Materials and Setup
The materials you need for this lab are A working PC with Windows XP installed An Internet connection
Lab Exercise 502: Using Driver Rollback
Getting Down to Business
The following steps cover the process of updating device drivers and the steps to roll back (uninstall) device drivers that turn out to be incompatible Step 1 Often, when you install a new expansion card, Windows (especially Windows XP) will have a perfectly suitable driver for the device However, if you would like to update the driver to address a problem, improve performance, or just add a new feature, this step will take you through the process of updating new drivers: a) b) c) d) Begin by verifying Internet connectivity for the system you will use to update the device Go to Device Manager, and expand the appropriate device category Locate the device you want to update (say a 56K modem) Right-click the device and select Properties Click the Driver tab, and click the Update Driver button (see Figure 5-4) This launches a wizard similar to the Add New Hardware Wizard
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