For example, assuming you're using XP Pro, if you can find, or borrow, an XP Pro installation disc, you might be able to perform a "repair" installation of XP using the instructions in the link below.. This "should" save your important files and documents and repair the operating system so it functions..
http://www.windowsxphome.windowsreinstall.com/installxpcdrepair/indexfullpage.htm
You haven't mentioned whether you have backups of all the important files, or WHY you haven't backed them up previously.. Primarily, because most HP/Compaq models have a hidden recovery partition which can be used to reinstall everything back to its factory condition.. Unfortunately, most of the recovery options are "destructive" recoveries and format the hard drive before reinstalling everything.. So, do you have backups of those files?
Hope this helps.
Grif
The Laptop currently effected is a:
HP Compaq 6530b
The current OS is:
Windows XP
Long story short this laptop used to be a company computer, however upon being retired from P&G the laptop was left to us to continue ownership.
Over the years quite a bit of important data has been collected, mostly pictures and other current job related stuff so recovery of its contents is very essential.
It is currently experiencing a BSOD, while trying to boot normally and in safe mode. Last good config yields the same results as well.
It came with no XP disk, or recovery disk for that manner.
"DRIVER_IRQL_NOT_LESS_OR_EQUAL" is the stop code displayed on the screen.
There were no recent hardware changes or software changes made to the laptop before these screens started. Lavaware removed quite a bit of basic malware a couple weeks ago, but nothing to alarming for a computer that had not been scanned in an extended period of time.
I am aware that with the installation of Windows Vista, the old files get piled up and set aside in a folder so you can gain access to them. I am not sure if I was to install Vista if that would happen or not, or completely reinstall Windows XP.
I did a live boot of Kali Linux on the laptop today in an attempt to gain access to the files, as I have always been able to with prior laptops however it shows an NTSF issue when I try to partition the drive.
I was going to just try to create a small new partition and install a new boot rec but that obviously is not possible.
Any suggestions? I can provide more info if requested.

Chowhound
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GameFAQs
GameSpot
Giant Bomb
TechRepublic