IRQL constant BSOD crash

I have been getting the BSOD nonstop. When logging into my password protected account, it stays up for about a minute or two before blue screening on me. For the main user account, it just BSOD's immediately after login.

Safe Mode also actually blue screens, but less so - I was able to attain the dump files and what not, so I can still open it.

I've also noticed I can't connect to the internet either - the network icon on the bottom right was always loading when I was able to log into either account. The internet doesn't work on Safe Mode either - not sure if that's always the case or not (sorry, not very tech savvy).

Windows popped up with this when I was able to login as well, if this helps at all:

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.768.3
Locale ID: 1033

Additional information about the problem:
BCCode: a
BCP1: 0000000000000000
BCP2: 0000000000000002
BCP3: 0000000000000000
BCP4: FFFFF80002CF52B3
OS Version: 6_1_7600
Service Pack: 0_0
Product: 768_1

Files that help describe the problem:
C:\Windows\Minidump\010411-25318-01.dmp
C:\Users\User\AppData\Local\Temp\WER-62650-0.sysdata.xml

My windows 7 is:
- 64 bit
- Vista was originally installed, but I was able to attain a Windows 7 upgrade disk from Dell
- OEM

- The hardware is about 1 1/2 years old, the current OS is about the same

Thanks for the help in advance.

Sorry to bump this, but I really need to know if this issue can be resolved before I leave town this weekend. Any help that can be offered would be great.

Can anyone please, please help with this?

I need to know if I can salvage this hard drive before I trash this one and purchase a new one.