1
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After the BIOS performs the POST, and if the PC has a Plug and Play BIOS, Plug and Play devices are configured.
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2
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The partition table is accessed, and the boot record activates the IO.SYS
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3
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The Windows 9x boot sequence performs partially in the real mode and then switches to the protected mode. Beginning at this point, the boot sequence performs in the real mode.
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4
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The MSDOS.SYS is checked for any Windows parameters (such as BootMulti or BootMenu).
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5
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If all is normal, the message Starting Windows 9X displays or the Windows 9X splash screen is displayed. The system pauses for 2 seconds to wait for a function key to change the boot path.
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6
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If file compression is in use, DRIVESPACE.BIN loads.
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7
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The Registry (SYSTEM.DAT) is checked, and if its valid, it loads.
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8
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Windows 9X performs hardware detection and identifies any new hardware.
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9
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IO.SYS processes the commands in the CONFIG.SYS and the AUTOEXEC.BAT files, if they exist.
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10
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The boot sequence switches to the protected mode.
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11
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WIN.COM executes.
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12
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The VMM32.VXD file and all virtual device drivers included in the Registry or the SYSTEM.INI file load.
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13
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Windows 9X core components - Kernel, GDI, and User -- load, along with the Explorer and network support.
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14
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Any applications in the startup (RunOnce) section of the Registry start.
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15
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The boot sequence ends.
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