I have been running Ubuntu alongside windows 10, but a recent update removed the grub loader.
I tried using Boot Repair as suggest by this post:
grub rescue> during windows 10 update
But it's repair made things worse. Now on startup I get the message: BOOTMGR missing.
I have tried fiddling with Bootrec /RebuildBcd as suggested here:
https://support.microsoft.com/en-us/kb/2622803
but I get nowhere and I don't know what I'm doing. Any help is greatly appreciated!
Here is the Boot Repair's report:
http://paste.ubuntu.com/13637524/
Update: Working from a live Ubuntu CD I can't seem to mount my Ubuntu partition because it no longer has a filesystem?
Best Answer
While I'm nowhere near as experienced with Ubuntu as the earlier answerer, I would advise you not to do anything irreversible.
My guess is that your Ubuntu system is still present, so try to reinstall without reformatting.
Your paste bin report shows Linux partitions to be present, and we have no reason to think that the Windows update would have destroyed it. I'm thinking is just messed up grub.
Take it slowly, and good luck.