Laptop Won't Start - WerFault Application Error

I tried to un-hibernate my laptop this morning (I tend to only hibernate it overnight if I know I'm going to be using it immediately the following morning) and it won't let me log in.

By this I mean that it takes at least 15 minutes of the cursor in the middle of a black screen before it gets to the Login screen. The first time this happened, I was able to Login, but after that, none of the icons loaded up, only the taskbar. After which, a message popped up saying "WinLogin.exe - Bad Login". At which point I manually restarted the computer (as the Start button wasn't working) and chose "Start Windows normally." Now I am at the point that whenever it gets to the Login screen, it immediately restarts, and thus goes into a loop. I stopped this loop by manually restarting again, and selecting safe mode, at which point I got the following error message:

"WerFault.exe Application Error The instruction at 0x000007FEFD6C283C referenced memory at 0x000007FEFD6C283C. The required data was not placed into memory because of an I/O error status of 0xc0000185. Click on OK to terminate the program." This was the only action I could take, so I did so. This immediately followed by an identical error message except with a different code, which began 0x000077....I was unable to see the rest because at that point the computer restarted.

Upon the next restart, I received a Blue Stop error message, which displayed for a few seconds before shutting down again. Key words I managed to see include: "There is an error with the program. The system was shut down to prevent damage to your computer. ...crucial thread issue...."

I literally have no idea what to do. If booting in Safe Mode has no effect, what can be done? I have also tried pressing F8 at the Dell startup screen (where it says to press F2 or F12 etc) but this just froze the machine!

I am running a 64 bit version of Windows 7 on a Dell Studio 1555 laptop.