A clean installation of Windows 8.1 is the installation of a new copy of Window 
    8.1 from scrach by erasing whatever is in the partition. It is referred to as a 
    "custom install" 
    
        - A clean installation of Window 8.1 is always started from booting a Windows 8.1 
            installation media in the computer to be installed. A Windows 8.1 can be a 
            bootable DVD disc or a bootable flash drive. An optical drive must be connected 
            to the computer in order to boot up the computer by the DVD disc. Otherwise a 
            USB dervice with a copy of properly copied Windows 8.1 installation files must 
            be used to boot up the computer by pluging into a USB port of the computer. 
            Setup the BIOS of the computer such that the computer can boot from the correct 
            installation device.
 
        Insert the correct Windows 8.1 installation media to the computer device and 
            power on the computer. After the standard BIOS boot up process, the Windows 8.1 
            splash screen will pop out to show that the Windows 8.1 setup process is 
            starting propertly.
            
        The Windows 8.1 setup process loads setup files into memory first so that the 
               setup process can continue. 
                 
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Before running the Windows 8.1 setup, the start-up program will ask the 
                preferences of the Windows 8.1 clean installation. The preferences include 
                "Language to install", "Time and currency format", and "Keyboard or input 
                method" 
            
           
                Select the right choice from the drop-down list accordingly, and click the 
                button "Next" to start the installation program.
                  
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Click the button "Install now" to confirm and activate the Windows 8 installation 
                process to proceed.  
            
                  
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The Windows 8.1 setup process will start and run a starting process to collect 
                information before 
                running the actual installation process. A starting screen will pop out to show 
                that the Windows 8.1 setup process is starting. Wait for Windows 8.1 setup to 
                begin. 
            
                  
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After running the starting process, the Windows 8.1 setup process will ask to 
                enter a product key for activating the Windows 8.1 before the installation 
                process can be continued. Unlike other versions of Windows, this step can be 
                skipped.
            
                  
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After entering the product key, a screen of the Microsoft Software License 
                Agreement page will pop up. Check the "I accept the license terms" box afte 
                reading through the agreement, and then click "Next" button to continue the 
                installation process.
            
                  
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After accepting the Microsoft Software License Agreement, a screen of type of 
                installation selection will pop up. There are two types of installation, Upgrade 
                or Custom. For a clean installation, a custom installation with installing 
                Windows only is the choice. Click the "Custom: Install Windows only (advanced)" 
                hyperlink to continue the Windows setup.
            
                  
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For a "Custom: Install Windows only (advanced)" 
                installation, a screen of where to install Windows will pop up. A list of all 
                the partitions that are available for installing Windows 8.1 are displayed. A 
                number of drive functions are provided for manipulating drives and partitions to 
                prepare the operating system installation partition. In fact, the options for 
                manually create a new partition, and format the install partition are not 
                necessary, as these are part of the Windows 8.1 setup process. For a new drive 
                with unallocated space, just select and highlight the appropriate unallocated 
                space to install Windows 8.1 onto, and then click the "Next" button to continue 
                the setup process. 
            For new versions of Windows 8.1 installation, an "Advanced Drive Options" option 
                is used to activate the drive functions and a small partition (350MB) may be 
                created automatically as a supporting partition labeled as System Reserved.
            
                  
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After selecting the partition. the Windows 8.1 installing process will start 
                automatically. Windows 8.1 setup will install Windows 8.1 onto the selected 
                partition step by step automatically. The computer will restart several times 
                during the installation. The installation process is much longer than the 
                initial setup.
            
                  
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After Windows 8.1 setup completes copying and installing windows files to the 
                partition, the installed Windows 8.1 needs to restart to continue. Do not click 
                the "Restart now" button to force the restart manually because the computer 
                should boot from the installed partition. Remove the Windows 8.1 installation 
                media during the ten seconds waiting time. 
            
                  
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If the Windows 8.1 installation media is removed and the computer has only one 
                Windows 8.1 partition, the newly installed Window 8.1 will boot up 
                automatically. The Windows 8.1 splash screen will pop out again to show that 
                Windows 8.1 is starting properly. If there is no Windows 8.1 splash screen and 
                the computer has more than one partition, restart the computer and setup the 
                BIOS of the computer such that the computer can boot from the correct 
                installation device. 
            The installed Windows 8.1 can now continue the installing process.
            
                  
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The installed Windows 8.1 continues the device installing process until the 
                getting devices ready is 100%
            
                  
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Afte the hardware setup, the installed Windows 8.1 continue to update and finish the installing until everything get ready.
            
                  
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Afte getting everything ready, the installed Windows 8.1 restarts the undated Windows 8.1 system automatically again.
            
                  
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Afte Windows 8.1 restarts again, the installed Windows 8.1 begins the basics preference setup to customize Windows 8.1. There are four basic preferences, personalize, wireless, settings and sing in.
            The first preference, personalize, is to customize the color theme of Windows 8.1 and the 
                name of the computer.
            
                  
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The second preference, wireless, customizes the wireless network of Windows 8.1 if 
                compatible wireless devices are available.
                
           
            The wireless network of Windows 8.1 
            can be chosen from the list of available wireless networks or click the "skip this step" hyperlink 
                to setup the wireless network of Windows 8.1 later.
                
            
                  
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The third preference, settings, customizes the basic settings of Windows 8.1.  
                There are two options, "Use express settings" with default settings recommended 
                by Microsoft, or "Customize" with options selected by user.
            Click "Customize" to customize the preference settings
                
            
                  
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The first page of Windows 8.1 basic settings. After setting, click "Next" button to continue to the second page.
                
            
                  
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The second page of Windows 8.1 basic settings.  After setting, click "Next" button to continue to the third page.
                
            
                  
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The third and last page of Windows 8.1 basic settings. After setting, click "Next" button to continue to the last preference.
                
            
                  
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The last preference, sign in, customizes the sign in account of Windows 8.1.  
                For new version of Windows 8.1, there are two options, "Sign in with a Microsoft account", or "Sign in without a Microsoft account" 
            Using "Sign in without a Microsoft account", and enter username and password accordingly.
                 Click the "Finish" button to completer the preferences setting
            
                  
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The Windows 8.1 continues to setup every preference setting automatically
            
                  
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After updates the preference, the Windows 8.1 continues to display a series of screens while starting the Windows 8.1. 
            The series of displayed screens are depending on the version of Thw windows 8.1 installed.
            
                  
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Finally, the Windows 8.1 displays the Windows 8.1 Start screen to indicate the completion of Windows 8.1 installation 
            and the starting of Windows 8.1 begins. Windows 8.1 can now be used as a normal user sign in created in preference setting.