These five points must be known before installing Windows 7 system

First, choose the installation method Now you have downloaded the ISO image and burned it to DVD. Next you have two options to run the installer. The performance of the Windows Installer depends on which method you choose. If your system already has Windows XP, Vista, or an earlier version installed, you can launch the installer from the Windows operating system. Alternatively, you can boot the system from the installation media. Either way, you will see a dialog box. What is the difference? If you run the installer in Windows. 1. You cannot run the 64-bit installer on Windows running x86. 2. Install Windows 7 and the existing Windows version in the same volume. 3, must use the existing partition, can not be changed, the installer does not recognize the unallocated space. If booting from a Windows 7 DVD: 1. You cannot upgrade an existing Windows version, you can only customize the installation. 2. You can delete an existing partition, create a new partition, extend an existing disk partition, or specify an unallocated space as the installation location. 3. Install Windows 7 and the existing Windows version in the same volume. In addition, if you launch the installer in Windows, you can choose to run a compatibility check on your existing system. Second, how to install a new installation If you plan to do a clean installation, it is recommended that you back up, then launch the installer from the Windows 7 DVD, eliminating any existing partitions. Because this will save you time and reduce some trouble. Now assume that you have already made a backup. Because all the data will disappear, so be sure to save it before you start. There are four steps to the new installation: 1. From the Windows DVD launcher, follow the prompts to select a custom (advanced) installation, then click Next to enter the screen; 2. Click the Drive option (Advanced) to display all available disks. Management tools; 3. Select a partition from the list and click Delete; 4. Repeat for any other additional volumes until nothing is left except for the unallocated space. Now you can complete the installation with all the unallocated space on the drive. Third, to find the old driver is not afraid In my test, so far, windows 7 is very detailed on the driver. But it's not perfect, some devices are blank, or replaced by generic drivers. If you have already installed an earlier version of Windows Vista or Windows 7, you do not need to use a special program to back up the driver from the old system. Windows Vista and Windows 7 save a local copy of all drivers in a folder called FileRepository, which is in a subfolder of the DriverStore folder. The full path is C:WindowsSystem32DriverStoreFileRepository. In a clean Windows 7 X86 installation, the FileRepository folder contains more than 900 MB of files. If you add some new devices or updates, this number can easily exceed 1GB. After you have completed the new installation of Windows 7, you can use Device Manager to install or update any drivers, or just click on you to save them. The old driver can be installed. 4. Fearless overwriting old folders When you instruct the Windows Installer to do a custom installation, it will move the old Windows, Program Files, and Documents and Settings to a file called Windows. Old. In the folder. The new installation creates a new set of top-level folders on the current system drive: Windows, Program Files, and Users. The benefit of this is that the single disk on the system has a new installation with only one partition and a large amount of free disk space. And no data will be lost. A new, non-destructive installation gives you a new start, and old data files are safely hidden in the Windows.old folder. To perform a clean and non-destructive installation, you can launch the Windows 7 installer on Windows or from the Windows 7 DVD, click on the installation steps, select the Custom (Advanced) option, then, in the list of available disk partitions, select one that contains your current Windows The installed partition. For most people, it's drive C. After you click OK, you'll see a warning dialog. After you've finished setting up, when you first start Windows 7, you'll see all your data and program files. In the Windows. Old folder. If you have any old data files to retrieve, you can find them in the Users folder (Windows Vista) or Documents and Settings. Fifth, the hard disk capacity requirements return to the original Under the current standard, you do not need a lot of disk space to install Windows 7. Microsoft announced the RC minimum hardware recommended 16G free disk space. But that's not a hard requirement. After installing Windows 7 Ultimate on a 10G drive (9.9G format) virtual machine, I still have 3.95G of free disk space. Later, I noticed that the full installation of Windows 7 Ultimate x86 requires 6 to 9G of space. Obviously, this amount will increase when you install additional programs or create data files. But how big should the system partition be? As a reminder, 15G is a minimum scale, but it will become tight sooner or later, so if you have enough spare disk space, it is recommended to reserve at least 30G.