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Dual boot with Ubuntu 14.04Lts can't boot into windows7
Hello,
I have recently installed Ubuntu 14.04Lts in dual boot on my second drive, but since then I am unable to boot into windows 7 on my first drive. Ubuntu is installed in UEFI like Windows. In my BIOS, I have the two options for my first drive( ubuntu and Windows Boot Manager), Ubuntu works fine but when I select Windows Boot Manager I get error :
Status : 0xc0000225
Info: A required device isn't connected or can't be accessed.
When I boot into Ubuntu, I got 3 entries in my GRUB menu : Windows UEFI bootmgfw.efi, Windows Boot UEFI loader and Windows Boot Manager(on /dev/sda1)
They all give me the same error when I select them :
file : \windows\system32\winload.efi
status : 0xc0000001
info : The application or operating system couldn't be loaded because a required file is missing or contains errors.
I have tried booting in UEFI on a windows 7 installation disk and running startup repairs, but it failed in System files integrity check and repair with failed-error code 0x490.
Can anyone help?
Thanks!