Maintaining and Protecting Your Mobile PC in .NET

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Maintaining and Protecting Your Mobile PC
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LCD Screen: Clean the screen with LCD cleaner (available at a computer store) or with isopropyl alcohol if approved by your computer manufacturer. Wipe your LCD lightly because the underlying glass is fragile. CDs and DVDs: Gently wipe each disc with a moistened, soft cloth. Use a motion that starts at the center of the disc and then moves outward toward the edge. Never wipe a disc in a circular motion.
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The Disk Cleanup tool is a utility that ships with Microsoft Windows and helps you free up space on your hard disk by identifying files that you can safely delete. You can choose to delete some or all of the identified files. Use Disk Cleanup to do the following: Remove temporary Internet files. Remove downloaded program files (such as Microsoft ActiveX controls and Java applets). Empty the Recycle Bin. Remove Windows temporary files. Remove optional Windows components that you don t use. Remove installed programs that you no longer use.
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In this exercise, you will run Disk Cleanup on your mobile PC to identify and delete unneeded files, freeing up disk space and improving computer performance.
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BE SURE TO log on to Windows as an administrator before beginning this exercise.
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Click Start, point to All Programs, point to Accessories, point to System Tools, and then click Disk Cleanup.
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Important If several drives are available, you might be prompted to specify which drive you want to clean.
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Disk Cleanup calculates the amount of space you will be able to free.
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Maintaining and Protecting Your Mobile PC
In the Disk Cleanup for dialog box, scroll through the content of the Files to delete list.
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Tip Typically, temporary Internet files take the most amount of space because the browser caches each page you visit for faster access later. 3 4
Clear the check boxes in front of files that you don t want to delete, and then click OK. When prompted to confirm that you want to delete the specified files, click Yes. After a few minutes, the process completes and the Disk Cleanup dialog box closes, leaving your computer cleaner and performing better.
Speeding Up Access to Data
As you create and delete files and folders, install programs, or download files from the Internet, your computer saves these files in the first contiguous free space that is large enough to accommodate it. If your computer doesn t have a large enough section of free space for the file, the computer saves as much of it as possible in the largest available space and then saves the remaining data in the next free space, and so on. As a volume fills up with file and folder storage, new files are saved in pieces across the volume. When you delete files, the empty spaces left behind fill in randomly as you store new files. This is known as disk fragmentation.
Maintaining and Protecting Your Mobile PC
Over time, fragmentation slows down disk access and degrades the overall performance of the system. When files are fragmented, the computer must search the hard disk each time the file is opened to piece it back together, causing the response time to be significantly longer. Disk Defragmenter is a Windows utility that consolidates fragmented files and folders on your computer s hard disk so that each occupies a single, contiguous space on the disk. With your files stored neatly end-to-end, without fragmentation, reading and writing to the disk speeds up. In this exercise, you will run Disk Defragmenter on your mobile PC to gather all the scattered file fragments on your hard disk and write them into adjacent clusters so that each file occupies a contiguous section of the disk.
BE SURE TO log on to Windows as an administrator before beginning this exercise.
Click Start, point to All Programs, point to Accessories, point to System Tools, and then click Disk Defragmenter.
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In the Disk Defragmenter dialog box, click the drives that you want to defragment, and then click the Analyze button.
You should analyze a volume before defragmenting it to get an estimate of how long the defragmentation process will take.
Maintaining and Protecting Your Mobile PC After the disk is analyzed, a dialog box appears, informing you whether you need to defragment.
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