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Like any technology, computers can and will fail usually when you can least afford for it to happen Hard drives crash, the power fails it s all part of the joy of working in the computing business You need to create redundancy in areas prone to failure (like installing backup power in case of electrical failure) and perform those all-important data backups 13, Maintaining Windows, goes into detail about using Microsoft Backup and other issues involved in creating a stable and reliable system
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Networks are without a doubt the fastest and most efficient vehicles for transferring computer viruses among systems News reports focus attention on the many virus attacks from the Internet, but a huge number of viruses still come from users who bring in programs on floppy disks, writable optical discs, and USB drives This chapter describes the various methods of virus infection, and what you need to do to prevent virus infection of your networked systems in the Network Security section
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To create a secure computing environment, you need to establish control over local resources You need to back up data and make sure that retired hard drives and optical discs have no sensitive data on them You should recognize
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security issues and be able to respond properly You need to implement good access control policies, such as having all computers in your care locked down with proper passwords or other devices that recognize who should have access Finally, you need to be able to implement methods for tracking computer usage If someone is doing something wrong, you and the network or computer administrator should be able to catch him or her! To mimic the physician s oath, here s the technician s oath: Technician, first, secure your data You need to back up data on machines in your care properly Also, techs need to follow correct practices when retiring or donating old equipment Let s take a look
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What to Back Up
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Systems in your care should have regular backups performed of essential operating system files and, most importantly, data files 13, Maintaining Windows, covers the process of backing up data, such as running the Backup or Restore Wizard in Windows 2000 and Windows XP, so the mechanics aren t covered here Instead, this chapter looks more critically at what files to back up and how to protect those files
Essential Data
By default, the Backup or Restore Wizard in Windows XP offers to back up your Documents and Settings folder (Figure 191) You also have options to back up everyone s documents and settings That takes care of most, but not all, of your critical data There are other issues to consider First, if you use Microsoft Outlook for your e-mail, the saved e-mail messages both received and sent will not be backed up Neither will your address book If you don t care about such things, then that s fine, but if you share a computer with multiple users, you need to make certain that you or the users back up both their mail and address book manually and then put
Windows 2000 and 2003 open the Backup Wizard with somewhat different settings You are prompted to back up the entire drive initially, for example, rather than just Documents and Settings This is also the case when you run the wizard in Windows XP in Advanced Mode
Figure 191
Backup or Restore Wizard
19: Computer Security
the backed-up files in the Documents and Settings folder! That way, the Backup or Restore Wizard will grab those files Second, if you or others on the computer use any folders outside the Documents and Settings environment, then you need to select the Let me choose what to back up option from the Backup or Restore Wizard when prompted This opens the Items to Back Up dialog where you can select individual files and folders to back up (Figure 192)
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