Blue screen Shows at startup

Gray, blue and white screens at boot time are almost basically the same thing. OS X corruption or incompatible third party software installed into OSX itself (called a kext file)

You can hold the Shift key upon boot (wired or built in keyboard might be needed) and this enters Safe Mode which will allow you to copy your users folders off the machine to a external storage drive (do not use TimeMachine for this)

Most commonly used backup methods

Run through this list of fixes, your likely going to see positive results when you finally get to do #8, unless the previous hardware test or disk utility SMART status says there is something wrong.

..Step by Step to fix your Mac

Turned on my 15.4-inch Macbook Pro 2011 (Model No: A1286) and it starts to load but then freezes on the Blue Screen during startup.
I have tried to reboot several times and even in Safe Mode but keeps going to the blue screen. I tried Internet Recovery and once the countdown went to 0 it just froze on a grey screen. Also tried Mac OS X Single User Mode Root Access- not sure if I followed it correctly because issue is still there.

Any suggestions out there? I have a lot of photos and personal