{"id":1421,"date":"2016-05-15T12:34:10","date_gmt":"2016-05-15T03:34:10","guid":{"rendered":"http:\/\/naraeon.net\/?p=1421"},"modified":"2024-09-24T22:43:28","modified_gmt":"2024-09-24T13:43:28","slug":"windows-bios-to-uefi","status":"publish","type":"post","link":"https:\/\/www.naraeon.net\/en\/windows-bios-to-uefi\/","title":{"rendered":"Change Windows boot method from BIOS to UEFI"},"content":{"rendered":"

Caution!<\/strong><\/span><\/h1>\n

This method is extremely dangerous. Clean install with UEFI is safer.<\/strong><\/span><\/h1>\n

Use at your own risk.<\/strong><\/span><\/h1>\n

UEFI provides you some advantages like faster boot. So in this article, you can get how to change the boot method without losing any data.<\/p>\n

Prerequisites.<\/p>\n

    \n
  1. Windows installation CD<\/li>\n
  2. gptgen<\/a><\/li>\n
  3. Minitool Partition Wizard<\/a><\/li>\n<\/ol>\n

    In this article I assume that you use your disk as a whole one partition without any smaller partitions like 100MB system partition. In this picture, I assume that your disk is like the disk at very bottom. If your disk is like highlighted, see this article<\/a>.<\/p>\n

    <\/a><\/p>\n

    Select the disk that has windows installation, and Click Move\/Resize Partition button in Operations group on the left.<\/p>\n

    <\/a><\/p>\n

    Subtract 228MB from Partition Size and input at Partition Size. And push 228MB at Unallocated Space Before and press OK.<\/p>\n

    <\/a><\/p>\n

    Press Apply at Top-left corner in the Main window, and Yes in Apply Changes? window.<\/p>\n

    <\/a>
    \nThen it will ask if you want to restart, then press Restart Now.<\/p>\n

    <\/a>After restarting, open cmd as Administrator and cd to gptgen directory. Type:<\/p>\n

    gptgen -w \\\\.\\physicaldrive(Disk number you got from Minitool)<\/p>\n

    After the operation, it can show you BSOD or not. Then restart.<\/p>\n

    Boot to Windows Installation CD and press Repair your computer<\/p>\n

    <\/a><\/p>\n

     <\/p>\n

    Press Troubleshoot.<\/p>\n

    <\/a><\/p>\n

    Press Advanced options.<\/p>\n

    <\/a><\/p>\n

    \u00a0Press Command Prompt.<\/p>\n

    <\/a><\/p>\n

    Run diskpart.<\/p>\n

    \n

    diskpart<\/p>\n<\/blockquote>\n

    And see list of disks.<\/p>\n

    \n

    list disk<\/p>\n<\/blockquote>\n

    Find your disk.<\/p>\n

    \n

    \u00a0 Disk ###\u00a0 Status\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Size\u00a0\u00a0\u00a0\u00a0 Free\u00a0\u00a0\u00a0\u00a0 Dyn\u00a0 Gpt
    \n———-\u00a0 ————-\u00a0 ——-\u00a0 ————\u00a0 —\u00a0 —
    \nDisk 0\u00a0\u00a0\u00a0 Online \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 238 GB\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 B\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 *
    \nDisk 1\u00a0\u00a0\u00a0\u00a0Online \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 372 GB\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 B\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 *
    \nDisk 2\u00a0\u00a0\u00a0\u00a0Online \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 298 GB\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 228 MB\u00a0\u00a0\u00a0 *<\/p>\n<\/blockquote>\n

    Only one disk has 228MB of free space. That’s Disk 2.<\/p>\n

    \n

    select disk 2<\/p>\n<\/blockquote>\n

    Create UEFI boot partition.<\/p>\n

    create partition EFI size=100 offset=1
    \nformat quick fs=fat32 label=”System”
    \nassign letter=S
    \ncreate partition msr size=128 offset=103424<\/p><\/blockquote>\n

    Then press<\/p>\n

    list volume<\/p><\/blockquote>\n

    And find the volume<\/p>\n

    \u00a0 Volume ###\u00a0 Ltr\u00a0 Label \u00a0\u00a0\u00a0\u00a0 Fs\u00a0\u00a0\u00a0 Type \u00a0\u00a0\u00a0\u00a0\u00a0 Size \u00a0\u00a0\u00a0 Status \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Info
    \n——–\u00a0 —\u00a0 ———-\u00a0 —-\u00a0 ———\u00a0 ——-\u00a0 ————\u00a0 ——–
    \nVolume 0\u00a0\u00a0\u00a0\u00a0 C\u00a0\u00a0 Windows\u00a0\u00a0\u00a0\u00a0 NTFS\u00a0 Partition \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 237 GB\u00a0 Healthy \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Boot
    \nVolume 1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SYSTEM\u00a0\u00a0\u00a0\u00a0\u00a0 FAT3\u00a0\u00a0Partition \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 100 MB\u00a0\u00a0Healthy \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System
    \nVolume 2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 NTFS\u00a0\u00a0Partition \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 450 MB\u00a0\u00a0Healthy \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Hidden
    \nVolume 3\u00a0\u00a0\u00a0\u00a0 D\u00a0\u00a0 Projects &\u00a0 NTFS\u00a0\u00a0Partition \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 372 GB\u00a0 Healthy
    \nVolume 4\u00a0\u00a0\u00a0\u00a0 E\u00a0\u00a0 \uc0c8 \ubcfc\ub968\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 NTFS\u00a0\u00a0Partition \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 297 GB\u00a0 Healthy
    \nVolume 5\u00a0\u00a0\u00a0\u00a0 S\u00a0\u00a0 SYSTEM\u00a0\u00a0\u00a0\u00a0\u00a0 FAT3\u00a0\u00a0Partition \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 100 MB\u00a0\u00a0Healthy \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Hidden<\/p><\/blockquote>\n

    We know the volume we finding is Volume 4 by size. So press<\/p>\n

    select volume 4
    \nassign letter=C<\/p><\/blockquote>\n

    Exit from diskpart.<\/p>\n

    exit<\/p><\/blockquote>\n

    Lastly create boot partition data with<\/p>\n

    bcdboot c:\\windows \/s S: \/f UEFI<\/p><\/blockquote>\n

    Then restart and set UEFI boot setting in BIOS.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Caution! This method is extremely dangerous. Clean install with UEFI is safer. Use at your own risk. UEFI provides you some advantages like faster boot. So in this article, you can get how to change the boot method without losing any data. Prerequisites. Windows installation CD gptgen Minitool Partition Wizard In this article I assume […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[139],"tags":[133,136,134,135],"class_list":["post-1421","post","type-post","status-publish","format-standard","hentry","category-windows","tag-bios","tag-booting","tag-uefi","tag-135"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"en","enabled_languages":["kr","en"],"languages":{"kr":{"title":true,"content":true,"excerpt":false},"en":{"title":true,"content":true,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/www.naraeon.net\/en\/wp-json\/wp\/v2\/posts\/1421","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.naraeon.net\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.naraeon.net\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.naraeon.net\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.naraeon.net\/en\/wp-json\/wp\/v2\/comments?post=1421"}],"version-history":[{"count":13,"href":"https:\/\/www.naraeon.net\/en\/wp-json\/wp\/v2\/posts\/1421\/revisions"}],"predecessor-version":[{"id":1845,"href":"https:\/\/www.naraeon.net\/en\/wp-json\/wp\/v2\/posts\/1421\/revisions\/1845"}],"wp:attachment":[{"href":"https:\/\/www.naraeon.net\/en\/wp-json\/wp\/v2\/media?parent=1421"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.naraeon.net\/en\/wp-json\/wp\/v2\/categories?post=1421"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.naraeon.net\/en\/wp-json\/wp\/v2\/tags?post=1421"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}