Windows 7: BSOD Loop, nothing works and is in a constant loop

Hi everyone, I have a Sony VAIO vpcEB4L1E.chk Laptop, with a 500 GB HDD , with a Intel core i3-380m processor / 2.53 GHz,with 4GB RAM, running on Windows 7 home premium 32 bit.
Until recently the laptop has been working fine, but all of a sudden it's stopped working. In its simpliest form, the laptop starts up, then it comes to a screen that has two options: Repair Windows using recommended settings, or start windows normally. When selecting start windows normally, the "starting windows" screen comes up, then all of a sudden a BSOD flashes momentarily on the screen and does the whole procedure again. I can't access any of the system restore options, as it loads up the windows 7 background and does nothing else.

I've tried all of the advanced system options after pressing F8 and they all do the same as the normal cycle. When trying to boot into the 3 safe mode options, I get a list of drivers that end in these two:
system/drivers/avgidseh.sys
system/drivers/avgrkx64.sys

I've also tried booting Windows from a normal DVD R CD and a 16GB NTFS Flash drive, and when attempting to re-install windows, it hangs on the "setup is starting" page and does nothing else. I've also tried booting from a Wondershare liveboot programme I downloaded and it acts the same way as the windows 7 CD, whereby it hangs on the screen, and up until recently, despite setting the boot options to external device I cannot boot from a Windows 7 CD or a USB flash drive.
Becuase it's a Sony VAIO, I've also tried restoring the laptop to its factory settings via the VAIO rescue centre, but when I go into the operation, it once again hangs where it says "please wait whilst VAIO care starts", showing nothing but a bar that does not load. When I actually was able to view the BSOD, it said this:

"A problem has been detected and windows has shut down to prevent damage to your computer.
UNMOUNTABLE_BOOT_VOLUME"
Then the following technical information:
"*** STOP: 0x000000ED (0xFFFFFFFFFFFFC0000185, 0x000000000000000... 000)

Before the crash my laptop was laggy for 2 days, but the last instance before the laptop failed I had AVG 2012 Anti Virus performing an update, if that's anything to do with it.



Any answers would be greatly appreciated because I've exhausted every option I can think of in trying to repair the laptop without trying to get it profesionally repaired or buying a new hard drive. Thanks you to anyone who's had the same problem/can help me fix it. Matt.

It sounds like a hard drive problem (the UNMOUNTABLE BOOT VOLUME is your hard drive).
Try these free diagnostics: Initial Hardware Diagnostics
Start with the hard drive test.

Good luck!

Hey Sorry for the late reply, have been very busy of late!!

Just tried the hard drive diag that was on the website, followed all the instructions, but again it doesn't work. It just boots to the 'repair windows' or 'boot windows normally' page, I've also tried using some Ultimate boot cds but they don't get recognised either! Is there anything else I can try doing?

Have you gone into the BIOS and changed the boot order so that the CD/DVD drive is first?

Hey, sorry for that! Anyway in my stupidity, I didn't change the boot order! But doing that I did manage to get started on the hard disk diagnostic, but it couldn't find my hard disk at all! No drivers have shown up at all, I'm guessing there's nothing else I can do now without going to a professional for help haha?

Try several of the hard drive diagnostics (both the Seagate Seatools and the Hitachi DFT (Drive Fitness Test).

The final test is to try another hard drive. If it's recognized by the tests (but your current drive isn't) - then it's safe to assume that the drive is dead.

Laptop hard drives are easy to replace, and you can obtain a set of recovery disks by contacting Sony in the UK.