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My computer : HP Elitebook Windows 10 Pro I have created a dual boot with ubuntu 20-04 LTS I cannot boot anymore on windows. I have tried boot-repair without success I have tried to repair the bcd with HirenBootcd tools : without success Here is the pastebin with the needed info (I hope) https://paste.ubuntu.com/p/YB2s6cRFQY/

TIA for your kind help Dirko

dirko
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    Have you tried changing the boot mode in BIOS to BIOS-compatibility/CSM/Legacy Mode? – Carl H Nov 13 '20 at 11:03
  • Windows needs UEFI, see here – kanehekili Nov 13 '20 at 11:07
  • @kanehekili - You're mistaken. The Ubuntu install should match the existing Windows installation. In this case, it appears that Windows is already installed in MBR/Compatibility mode. This is atypical these days but not unusual. OP should attempt to boot the installation media in BIOS/MBR/Compatibility mode. Another alternative is to format the disk as GPT and reinstall both operating systems in UEFI mode – Nmath Nov 13 '20 at 11:56
  • @Nmath- thanks for clearing this up. I thought that Windows 10 needs UEFI, while Win8 does not. But your're right about "matching" - therefore I thought if Win10 then UEFI, then Linux must be installed the same – kanehekili Nov 13 '20 at 20:10

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If you can't find Windows boot manager in the grub menu, sudo update-grub should fix it.

Amith
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