Ok my brother's computer is a 2.5 year old dell (We got our computers before I was ever interested in PC building) and when he came home, he saw a windows warning saying 'Hard disk failure, please backup your files immediately' or something to that effect. Thankfully he always has a WD external USB hard drive connected to his pc so he started the backup. But at 12%, the backup window said 'not responding' and the pc crashed.
I don't know what to do from here, I'm considered 'the tech guy' of my family so I'm somewhat expected to make it all better and I'm stumped. I need your guys' help on how to proceed.
Also, I don't think a virus did this as he has an antivirus and only uses sites like youtube, twitter facebook and wikipedia.
Thanks for reading and I'll be greatful for any help.
Update: We turned the computer back on again and although there are some unsual noise coming from the HDD, we're trying the backup again and I think we're at 8% atm, I'll keep updating this.