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manu4u
February 27th, 2016, 08:07 AM
Hi I had a system working fine with dual-boot - Windows 10 + Ubuntu. But the latest update from MS caused the screen to go blank. By mistake I clicked on Windows 7 recover procedure and that caused me to get to grub-recover> screen.

Ran boot-repair and I could not even see that said that could not find a bootable drive :(

Tried to install grub using Ubuntu Live-CD and now opens grub> but am not stuck.

Can someone please help.

manu4u
February 27th, 2016, 10:20 AM
Got windows restored, but the extended partition containing the Linux is no longer visible to grafted (shows up as unallocated memory). Was running Ubuntu using a live CD to see this.

manu4u
February 27th, 2016, 10:23 AM
Correction gparted and not grafted

oldfred
February 27th, 2016, 03:49 PM
Windows bug on partition updates with major upgrades or installs. It forgets to write Linux logical partitions. Partition is still there, just not in partition table.

Most can restore partition to partition table with parted rescue or testdisk. Some just then work, others have to reinstall grub.

sudo parted /dev/sda unit s print
http://askubuntu.com/questions/654386/windows-10-upgrade-lead-into-grub-rescue/655080#655080
Windows 7 to Windows 10 MBR partition missing
http://ubuntuforums.org/showthread.php?t=2288988
http://ubuntuforums.org/showthread.php?t=2290190
http://ubuntuforums.org/showthread.php?t=2292545
Use parted rescue to restore missing partition details in post #22
http://ubuntuforums.org/showthread.php?t=1775331
http://www.gnu.org/software/parted/manual/html_node/rescue.html
http://gparted.sourceforge.net/faq.php/#faq-22
Parted rescue seems easier than testdisk
http://askubuntu.com/questions/665445/upgraded-to-windows-10-on-dual-boot-and-cant-boot-to-ubuntu-partition/665462