If the error “the requested system device cannot be found” occurs when you try to perform Bootrec operations using a USB installation media, it may not find the correct system partition, which causes bootrec \/rebuildbcd device cannot be found Windows 10 issue. You may try this method to set the correct partition.<\/p>\n\n\n\n
Step 1. Boot from a UEFI Windows 10 installation (CD\/DVD\/USB) disk, and in Advanced options<\/strong>page, choose Command Prompt<\/strong>.<\/p>\n\n\n\n Step 2. Input\u00a0diskpart<\/strong>\u00a0and press\u00a0Enter<\/strong>\u00a0to list all partitions and for you to identify EFI partition. Please note that EFI partition is formatted as FAT32 type<\/p>\n\n\n\n Step 3. Input select volume 3<\/strong> and press Enter<\/strong> (here volume 3 is the volume number of the EFI partition).<\/p>\n\n\n\n Step 4. Input assign letter=m<\/strong> to assign a letter to the EFI partition and press Enter<\/strong>. You may replace m with a letter of your choice.<\/p>\n\n\n\n Step 5. Input exit<\/strong> and press Enter<\/strong> to exit diskpart<\/p>\n\n\n\n Step 6. Then type the following commands in Command Prompt and press Enter<\/strong> after every command.<\/p>\n\n\n\n cd \/d m:\\EFI\\Microsoft\\Boot\\<\/strong><\/p>\n\n\n\n bootrec \/fixboot<\/strong><\/p>\n\n\n\n Step 7. Input ren BCD BCD.bak<\/strong> and press Enter to change the name of BDC file from BCD to BCD.bak file.<\/p>\n\n\n\n Step 8. Input bcdboot c:\\Windows \/l en-us \/s m: \/f ALL<\/strong> and press Enter<\/strong> to recreate BCD. If the letter you’ve assigned for the EFI partition earlier is not m, then change it in this command accordingly.<\/p>\n\n\n\n Step 9. Input exit to close Command Prompt and restart your computer.<\/p>\n\n\n\n This solution has helped many people resolve the error the requested system device cannot be found Windows 7\/8\/10 and rebuild BCD, especially for people who use a USB installation media to rebuild MBR.<\/p>\n","protected":false},"excerpt":{"rendered":" If the error “the requested system device cannot be found” occurs when you try to perform Bootrec operations using a USB installation media, it may not find the correct system partition, which causes bootrec \/rebuildbcd device cannot be found Windows 10 issue. You may try this method to set the correct partition. Step 1. Boot Read More<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[10,14],"tags":[],"class_list":["post-92","post","type-post","status-publish","format-standard","hentry","category-microsoft","category-windows-7-8-10"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/SUMMALAI.COM\/index.php?rest_route=\/wp\/v2\/posts\/92","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/SUMMALAI.COM\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/SUMMALAI.COM\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/SUMMALAI.COM\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/SUMMALAI.COM\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=92"}],"version-history":[{"count":0,"href":"https:\/\/SUMMALAI.COM\/index.php?rest_route=\/wp\/v2\/posts\/92\/revisions"}],"wp:attachment":[{"href":"https:\/\/SUMMALAI.COM\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=92"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/SUMMALAI.COM\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=92"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/SUMMALAI.COM\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=92"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}