Resolved Windows XP will only boot into safe mode

Hello,
This morning I did something VERY stupid, I clicked on an exe file I shouldn't have...don't ask...I know it was stupid and now I'm paying the price as my computer is pretty much useless at the moment.

Prior to this, I actually did a disk defrag this morning, went to pcpitstop and everything was running great.
When I clicked on the offending exe file (I don't know what it was because at that point my screen went black). I immediately tried to shut down the pc..wouldn't even turn off with the power button so I shut down with the power bar.
When I booted back up I got a blue screen with stop error:
stop 0x0000007E (0xC0000005,0xBA241184,0xBAD02D44,0xBAD02A40)

When I got this error I could not boot into safe or normal mode, the only way I got into safe mode was by doing a repair install of XP.(I have XP Prof SP2 (I did have SP3 but since the repair I can't update) .I tried to do a system restore but there were no restore points so I'm guessing they must have been erased somehow.
Once in safe mode, I tried doing a selective startup, a diagnostic startup, etc disabling everything but necessary files but when I rebooted the Dell logo appeared as normal, then the winxp loading screen, then it went back to the dell logo then winxp then a black screen stating that windows could not load I tried booting into normal mode but it kept coming back to this black screen
I have WinXP (now SP2 as I did the repair install and have been unable to install the SP3 updates). When I booted without disabling automatic restart the same blue screen error occurred.
I then tried to do a chkdsk from command prompt in safe mode. When it asked me to reboot it did not start the chkdsk instead it went into the dell logo/windows logo loop and then the error again. I decided to try a repair install and while loading that, chkdsk started...it came back clean
I've run Malwarebytes (it did find 2 trojan downloader files that I deleted-I ran in safe mode & did full scan) and SuperAntispyware (just found 3 cookies) and Avira Antivir (found nothing) in safe mode. I thought maybe the display drivers may have been causing the problem so during the repair install windows asked if I wanted to install nvidia drivers (they're unsigned) and I said no the second time but still no dice.

Before I take this computer in for major repair does anyone have any suggestions of something else I can try or maybe have an idea of what's causing this. I tried to run SFC from the command prompt & got error this error: Windows File Protection could not initiate a scan of protected system files.The specific code is 0×000006ba (The RPC Server is unavailable)
Is something else out there that can tell me more specifically why this is happening and if there's any way of correcting it? I'm assuming the MBR isn't damaged because I can still boot into safe mode although this afternoon that stopped working too and that's why I did a repair install again .
Thanks in advance. I'm on my husband's computer right now so will check back when I can.
Sorry for my long post..I'm a little tired as I've been trying to figure this out all day.

 

O.K., I seemed to have found the cause..finally. I uninstalled the graphics drivers in safe mode and windows finally booted in normal mode. The graphics card is Nvidia GeForce 6800. Right now my computer is just using the standard graphics drivers and has no monitor listed in device manager. Does anyone know how to add my monitor back. I'm in the process of applying windows updates right now so will probably leave it until tomorrow.

 

Thanks Evan, I actually just downloaded & installed the newest drivers from nvidia's website and all is working fine. I only have one error in my event viewer which I'm trying to pin down:


Service Control Manager Event 7026:
The following boot-start or system-start driver(s) failed to load: sptd

I've googled this error and it's related to daemon tools which as far as I know, I don't have nor have I ever had. Any idea of how I can remove it? The error only started occurring yesterday when my computer crashed so perhaps another malicious program tried to install it with something?
I have one file sptd.sys in Windows\system32\drivers folder.
Properties of file: Company Duplex Secure Ltd.
File Version: 1.55.0.0 built by: WinDDK
Product name: SCSI Pass Through Direct
Product version: 1.55.0.0

Thanks for your help!

 

I found Duplex's website and downloaded their removal tool for sptd but it didn't detect it in my system so I followed their instructions to disable it:
Find "HKEY_LOCAL_MACHINE\System\CurrentControlSet\ Services\sptd" registry key in REGEDIT and set DWORD Start value to 4 (i.e. disabled).

The error is now gone.
Thanks!

 

Thanks Evan