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The Windows NT startup process is the process by which Windows NT 4.0, Windows 2000, Windows XP and Windows Server 2003 operating systems initialize. In Windows Vista and later, this process has changed slightly; see Windows Vista startup process for information about what has changed. ==Installer== The Windows NT installer works very similarly to a regular Windows NT install except that it runs from a CD-ROM. For this boot method to work, the BIOS must be compatible with the El Torito specification. The ISO 9660 file system on the install CD is not fully compatible with the standard. Although it is "Level 1", the file names don't have the file version appended to it. The boot image is of the "no emulation" type, 1 sector long (2048 bytes) and is loaded at segment 0x7c0. 〔(【引用サイトリンク】url=http://cdburnerxp.se/help/Data/bootdisc )〕 It can be extracted from an ISO image by using 7-zip. The ISO image is also not hybridized like ISO images from most Linux distributions and therefore it does not contain any master boot record (MBR) which makes it unable to boot by just copying the image over a block device such as a pen drive. The installer can also be run from a MS-DOS command prompt so previous versions of Microsoft Windows that are already installed can be upgraded. To run the installer from a MS-DOS based operating system such as Windows 98 or Windows ME, the user must start the system "in DOS mode" and then execute I386/WINNT.EXE on the CD-ROM. 〔(【引用サイトリンク】url=https://www.easydesksoftware.com/I386.htm )〕 A floppy disk containing MS-DOS can be used to start the installer. Versions of the installer in floppies were also available for sale.〔(【引用サイトリンク】url=http://support.microsoft.com/kb/310994 )〕 From Vista onwards, the installer runs from BOOT.WIM which contains a bootable version of Windows PE. Windows PE is based on the Vista kernel. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Windows NT startup process」の詳細全文を読む スポンサード リンク
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