Our laptop initially had 12.04 LTS, and then we upgraded to 14.04 LTS. But the 14.04 version had so many errors, I had to disable further updates.
Skip a year later, laptop crashes frequently and my father suggested re-enabling the updates. I enable them, updating process starts and doesn't end. It got to around 70% and stopped. I used the power key to shutdown the laptop.
The next day, my mother calls me and tells me that the laptop wouldn't start. I go back home and I try starting it. It doesn't start up at all.
I had several options and I chose to revert to 12.04. Unfortunately, that just erased ALL files. Everything. 3 years worth of work gone in a minute.
I believe it was a factory reset, but I am not sure.
Is it possible to restore some of the files?