BSoD After Windows 7 Start up window

I went to the toilet for 5 minutes and when I came back, my computer was off so I tried restarting it and this happened. Its my custom built PC. Its been fine for a few months but a few weeks ago, It said before start up: SATA3G_6 Hard Disk:S.M.A.R.T. Status BAD, backup and replace. I don't know whats happened.

Problem Event Signature: StartupRepairOffline
Problem Signature 01: 0.0.0.0
Problem signature 02: 0.0.0.0
Problem Signature 03: unknown
Problem Signature 04: 0
Problem Signature 05: unknown
Problem Signature 06: 01
Problem Signature 07: unknown
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1033

Some one please help me. I've not created a back up or a disk image file so It better not wipe the memory.

I happily would but my pc wont get past windows is starting screen :/

Yes I have the disk right next to me but I am debating whether to go to a professional to recover my data first and back it up for me and then reinstall the OS. I have also tried the page you gave me and nothing happened.

I am unable to find any of the data.