Vista - Severe boot problem!! Help!!

Everytime I boot my computer I get the message,

"system32\driversdis.sys
Error: 0xc0000221
Microsoft failed to load because a Critical system driver is missing, or corrupt"

I've tried getting back into Windows
by using all the Safe mode options and
Last Known Working Config options,
but they all churn out the same error as above.

I've tried inserting the DVD disk and selecting the 'repair windows' option.
That also doesnt work, but it gives me an error log, and an entry pops up that says,
0x8000FFFF "Catastrophic failure!"
(sounds bad, right?)

So Windows cant repair itself, fine.
But when I try to get back to a previous restore point however,
I get yet another message that says,
"Access Denied"

What is going on! I feel like I've been locked out of my own computer!

Another thing is, I can get into MSDOS using the DVD (which might be the only saving grace left).
So I've tried typing,
'bootrec.exe /fixboot'
but that doesnt solve the problem either.

And I also tried typing,
'bcedit'
which gives me the following log,

Windows Boot Manager
--------------------
identifier {bootmgr}
device partition=C:
description Windows Boot Manager
locale en-US
inherit {globalsettings}
default {default}
resume object {6e48fb2d-6f3b........}
displayorder {memdiag}
timeout 30

Windows Boot Loader
-------------------
identifier {default}
device partition=E:
path \Windows\system32\winload.exe
description Microsoft Windows Vista
locale en-US
inherit {bootloadersettings}
osdevice partition=E:
system root \windows
resume object {6e48fb2d-6f3b........}
nx OptIn


As you can see the drive partition in the
Boot manager C: is different from the Boot Loader E:
(I'm pretty sure it's supposed to be the same)
(I cant remember why the Vista OS drive got named into E: )
Vista is actually installed in the E: drive NOT the C: drive.

Does anyone know what's going on?

Just to add, I think this happened straight after the latest windows update.
I've tried googling for the solution but it seems that I'm the only one experiencing this specific problem.
Pls pls pls Help!!!!!!!

seems really strange...yeah i always keep my updates on notify my and i will install..had some driver problems which gave me boot probs but not like urs...also..u might wanna try doing a reformat...unless u got stuff on there thats totally important...if u do...then

i dont know.
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