SPTD.sys Cannot boot.

Greetings.

Two days ago, my machine (not this one) had a crash while accessing a ISO image. The program Alcohol 52% was running this image (created and stored on my machine) when it crashed. Upon restart, the computer booted as it should, until it got past the WinLogon screen. I then recieved a BSOD with an Unbootble boot sector error, and a prompt restart.
Naturally, i chose to restard in safe mode for diagnostics. I am prompted to press esc. to cancel loading SPTD.sys. SPTD.sys is a virtual driver, which is understandable, figuring it is in the drivers folder. When i do not choose to cancel loading SPTD, the computer restarts into an infinite loop. When i choose to cancel loading the drive, a similar process occurs. There is absolutley no way to access a windows operating system on the hard disk.
I have since done several things. First, i renamed the file. This accomplished nothing, merely doing the same things as before except prompting to cancel the file in safe mode. I then proceeded to back up and delete the file. Again, it was to no avail.
Alongside modiying the file, i have also scanned the boot sector for drive errors. No errors found there, but i do know of problems on other areas of the hard disk. They have been there for quite some time, and haven't affected windows otherwise.
I've run a DOS web browser on that computer, and searched far and wide for a solution, but to no avail. I found similar problems, but they all had one difference: They could log on to windows one way or another. Finally i am able to post a topic on my issue here.

Other information you may need:
Operating System: Windows XP Home SP2
Alcohol 52% I am unable to confirm version (can log on, remember?) but i do know it prompted me to update.
SPTD.sys is about 13,500kb in size, is that normal for this driver? Perhaps it is large/corrupt due to the crash?

Any other information? Ask me. I will try to remember as much as i can for you.

And as always, move this topic if nessicary.

If you bypassed loading SPTD, I doubt that it's related to the issue. Try booting from your Windows CD to the Recovery Console (a command prompt) and run chkdsk /f c: to run a scan of the HDD. If there's any errors on the drive, that should clear them up. If it does detect errors, it could also indicate that your drive is failing (I'm referring to surface errors or bad sectors, not file structure errors).

In Windows you must use the /r switch to scan for surface errors, I'm not sure about the recovery console.

Either way, chkdsk /? will bring up the list of command-line options.

Well, i cant chkdsk because my Windows CD literally exploded in my drive on a prior installation. It killed the drive too, it sucked.

I used the Ultimate Boot CD to do some diagnostic. I observed the broken hard drive sectors. I checked those parts, and they were all parts of files which i knew were broken. Still nothing with the boot sector.

I'll use a chkdsk when i can, and at that point i may as well just repair install.

I did do a chkdsk the same day, earlier. It found and fixed some files. Nothing serious.

Frankly, this just sucks.

It seems that your filesystem isn't so stable. Perhaps you should consider a format and replacing the disk in case it has a lot of bad sectors, at least if they are becoming more and more.