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CompTIA A+ certification exams test you on your ability to upgrade a Windows 9x or Windows NT system to Windows 2000 or Windows XP You do not need to know about Windows 9x or NT for the tests, but you do need to know how to upgrade them
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A clean installation usually begins with a completely empty hard disk The advantage to doing a clean installation is that you don t carry problems from the old OS over to the new one, but the disadvantage is that all applications have to be reinstalled and the desktop and each application reconfigured to the user s preferences You perform a clean install by resetting your CMOS to tell the system to boot from the optical drive before your hard drive You then boot off a Windows 2000 or XP installation CD-ROM, and Windows will give you the opportunity to partition and format the hard drive and then install Windows
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In an upgrade installation, the new OS installs into the same folders as the old OS, or in tech speak, the new installs on top of the old The new OS replaces the old OS but retains all saved data and inherits all the previous settings (such as font styles, desktop colors and background, and so on), hardware, and applications You don t have to reinstall your favorite programs! To begin the upgrade of Windows, you must run the appropriate program from the CD-ROM This usually means inserting a Windows 2000 or Windows XP installation CD-ROM into your system while your old OS is running, which will start the install program Then, to do an upgrade, you indicate that
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Windows 2000 or XP should install into a directory that already contains an installation of Windows (it will do this by default) You will be asked whether it is an upgrade or a new installation; if you select new installation, it will remove the existing OS before installing If for some reason the install program doesn t start automatically, go to My Computer, open the CD-ROM, and locate WINNT32EXE This program starts an upgrade to Windows 2000 or XP
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A third option that you need to be aware of is dual boot or multiboot installation Both Windows 2000 and Windows XP can install in a separate folder from your existing copy of Windows Then every time your computer boots, you ll get a menu asking you which version of Windows you wish to boot Multiboot sounds great, but it has lots of nasty little problems For example, let s say you ve got a system running Windows Me that you would like to upgrade to Windows XP Windows Me must use either a FAT or a FAT32 file system; Windows XP can use these old file systems, but you ll miss out on the benefits of using NTFS
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Other Installation Methods
In medium-sized to large organizations, more advanced installation methods are often employed, especially when many computers need to be configured identically A common method is to place the source files in a shared directory on a network server Then, whenever a tech needs to install a new OS, it is a simple task of booting up the computer, connecting to the source location on the network, and starting the installation from there This method alone has many variations, and it can be automated with special scripts that automatically select the options and components needed The scripts can even install the necessary applications at the end of the OS installation all without user intervention once the installation has been started Another type of installation that is popular for re-creating standard configurations is an image installation An image is a complete copy of a hard disk volume on which an OS and, usually, all required application software has been preinstalled Images can be on optical discs, in which case the tech runs special software on the computer that copies the image onto the local hard drive Images can also be stored on special network servers, in which case the tech connects to the image server using special software and copies the image from the server to the local hard drive A leader in this technology has been Norton Ghost, which is available from Symantec Other similar programs are PowerQuest s Drive Image and Acronis s True Image
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