Yeap exactly this error..
What is the right step if we get this error?
I'm not too sure..
based on my experiance
My advice is to check the hardware issue first place in in other laptop and check if it can boot up.
( I didn't do this because i though this related to SafeBoot Issue )
if came up with same error then
if possible get the exact match hardisk spec and clone the hardisk before doing further recovery step.
do recovery on clone hardisk - this to make sure the original hardisk is safe from any mistake in recovery processes.
Do backup and get right step to recover don't mess the hardisk like me...

sad