I have dual booted Ubuntu 16.04 on a windows laptop. I have been using it for a week now. All of a sudden while I was working on Ubuntu it just blacked out and when I tried switching back my laptop on it's going directly to Windows.
I did check the BIOS menu and it doesn't show any sign of Ubuntu there.
And furthermore, time setting on my Windows has been messed up too.
I don't know if this matters but my battery was in critical mode while I was working but it still had some charge left.
Any help is appreciated. Thank you.