Blue screen of death

Hello,
Okay so my computer wont start up.
It turns on and then goes to a screen that says:
Safe mode
Safe mode with networking
Safe mode with command prompt
Last known good configuration
Start windows normally

And none of those work.
all of the safe modes get stuck on crcdisk.sys
and start windows normally ends with the blue screen of death saying this:
0x00000001A (0x00041287,0x000000044,0x00000000, 0x000000000)
MEMORY_MANAGEMENT

So I tried to boot from the windows setup disk
and when I click Install windows it crashes with this message
at the blue screen
Check to be sure you have adequate disk space
***STOP: 0x0000007E (0xC0000005,0x8955D610,0x8719971C,0x87199418)

My computer is about 3-4 years old and It has been fine up until now.
It runs windows vista.

I think it might not have any more room on it, but how would I
go about deleting files off of a computer that wont start.
But what would I know.
D:

Also the computer crashed while I was playing a game and hasn't come on since.

Any ideas? Help~