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I can't access Windows 10 although at boot screen there is an option. If I choose Windows there is a purple screen and freezes there. I did boot repair but still the same.

My partitions BootScreen

I don't know what I messed up during installation

Will I need to format and reinstall Windows again?

fdisk output if it helps

Device     Boot      Start        End    Sectors   Size Id Type
/dev/sda1             2048 1518618623 1518616576 724,1G  7 HPFS/NTFS/exFAT
/dev/sda3  *    1518618624 1778022399  259403776 123,7G  7 HPFS/NTFS/exFAT
/dev/sda4       1778024446 1953523711  175499266  83,7G  f W95 Ext'd (LBA)
/dev/sda5       1941108736 1953523711   12414976   5,9G 82 Linux swap / Solaris
/dev/sda6       1778024448 1941108432  163083985  77,8G 83 Linux

Partition 4 does not start on physical sector boundary.
Partition table entries are not in disk order.
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  • Once try to reinstall grub, open up your terminal, And then type this commands: sudo grub-install and then enter your password and then run this command, after installing grub sudo update-grub. Now reboot.
    – user495867
    Jul 7, 2016 at 13:53
  • Still the same. I ran Boot info Script and said that Grub2 is in /dev/sda so I reinstalled grub there. But nothing happened. I can access files from Ubuntu 16.04 but no access to windows 10. Should I install grub somewhere else or something?
    – tcm
    Jul 7, 2016 at 14:33

1 Answer 1

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i can't answer this specifically. but, i have seen a lot of questions about a dual boot with win 10. i tried the same thing and same problem. i could dual boot. but, had to go through hoops. the windows boot loader didn't work. had to manually go in & select the partition to boot from. HOWEVER, recently, i had a bad sector & reinstall ubuntu. (something else) with automatic updating. that install keeps the data but reloads the system. i got back my system. noticed that grub2 was updated. AND, now the ubuntu dual boot loader works. my 2c. suggest a reinstall with updating commponents. (it also got my flash viewer to upgrade & work) using Ubuntu 16.0.4 LGT

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