Duel boot Vista and Win 7 error 0XE0000100


  1. robinbredin
    Posts : 14
    win 7
       New #1

    Duel boot Vista and Win 7 error 0XE0000100


    What it is, i'm trying to duel boot Win 7 and Vista, on another HD. But my system is a Inspiron 570 running Win 7 HP 64bit, and it is setup in the BIOS as a ACHI. When I run setup on Vista, I choose a Custom, where it asks for upgrade, but the upgrade is greyed out, because I'm doing a clean install, then a error dialog box comes up and says,

    "Windows install encountered an unexpected error, Verify that you have the Installation source are accessible, and restart the installation".

    ERROR CODE: 0XE0000100

    The drive that I'm trying to install Vista on is a 80GB drive with no partitions.
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  3. gregrocker
    Posts : 50,642
       New #2

    Unplug the Win7 HD during Vista install, boot the Vista DVD to install to wiped HD: SSD / HDD : Optimize for Windows Reinstallation

    AHCI mode might block Vista install, but Win7 won't run if you change it back to IDE mode.

    If you get Vista installed, set preferred HD to boot first in BIOS setup, then boot the other HD using one-time BIOS boot menu key given on first screen, in your setup literature, or in your Manual on the Support Downloads webpage for your computer model.
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  4. Bare Foot Kid
    Posts : 22,814
    W 7 64-bit Ultimate
       New #3

    Vista does AHCI with no issues at all.
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