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Can't log in - winlogon.exe crashes


Robby
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I have spent all of last night and this morning searching and trying to figure this out. Every time I start windows, I get to the part where it has the pretty blue screen that says "Welcome", and I get this error: "winlogon.exe" instruction at 0x00000000 referenced memory at 0x00000000. The memory could not be written. I was having problems with the video card before it happened, so I'm thinking it might be that. The only thing I've been changing/working on lately was trying to get the drivers to work. I had to disable agp440.sys to be able to start in safe mode, but unfortunately I got the same error. I also used my XP CD and used the recovery console to fix it. (That's how I disabled agp440.sys) I did a chkdsk c: /R and it said it found a few errors and fixed them, but after rebooting, I got the same error. I have linux on another hard drive and I ruled out the netsky virus because I don't have a winlogon.exe in the /WINDOWS folder. Of course I might still be wrong. If anyone could help me out, I would really appreciate it! It's just hard to fix it when I can't get into windows.

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So you can log in, Right..?? :blink: You are able to get into windows and do things.? Right.? :P

I was having problems with the video card before it happened, so I'm thinking it might be that. The only thing I've been changing/working on lately was trying to get the drivers to work. I had to disable agp440.sys to be able to start in safe mode, but unfortunately I got the same error.

Ok, So you did make sure to uninstall your onboard chipset drivers first, Right.??? That makes a differance.. :)

I also used my XP CD and used the recovery console to fix it. (That's how I disabled agp440.sys) I did a chkdsk c: /R and it said it found a few errors and fixed them, but after rebooting, I got the same error.

Put your windows disk back in after you've booted up from the hard drive ( don't boot from the disk ), Go to Command Prompt and type:> SFC/Scannow at the prompt, then press enter.. Just let it do it's thing.. Anything missing from the windows system will be replaced.. :lol:

I had to disable agp440.sys

WHY...???? :unsure:

I ruled out the netsky virus because I don't have a winlogon.exe in the /WINDOWS folder.

Please explain this a little more.. :huh:

I have linux on another hard drive

Thats good, At least you've got something.. ;)

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No, I can't get into windows. It just hangs at the welcome screen.

I'm not sure how to uninstall the onboard chipset drivers. What does that do?

I disabled agp440.sys because when loading, it would always hang there.

About the virus. I heard that that particular virus affected winlogon.exe. The worm names itself winlogon.exe and places itself in the WINDOWS\ directory.

The other thing I might try is just doing a repair install because I can't figure anything out on this...

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I'm not sure how to uninstall the onboard chipset drivers. What does that do?

Well you've got a graphics chip on your motherboard wich has it's own drivers in order to make it work.

When you add an add-in Graphics Card you have to uninstall the onboard chips drivers (Before installing the new card), Otherwise... It causes big problems, And i know that first hand.. ;)

I disabled agp440.sys because when loading, it would always hang there.

Well i'm kinda curious why you did that, Sounds like a more serious problem ( maybe ), and should have been resolved differantly.. As in something else not installed correctly.. :unsure:

I heard that that particular virus affected winlogon.exe. The worm names itself winlogon.exe and places itself in the WINDOWS\ directory.

Yea, Probably Winnt/System32 , Thats where windows usually looks for things.. But i've never heard of that particular virus before.. :P

The other thing I might try is just doing a repair install because I can't figure anything out on this...

Have you tried the other option in that menu.?, Where you did Safe Mode., Try booting with Last known good configuration and see if that one just dosen't solve you're problem... :rolleyes: ;)

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I did try the Last Known Configuration one. I also tried all of the other options in the Safe Mode menu!

I'll try the chipset driver as well when I get home, because I never knew about that.

HUH, Thats wierd

The only other thing i can think of then is to boot up from your disk and use the "R" option at the prompt to repair your system..

But that basicaly reformattes the whole hard drive and you lose everything... :angry:

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Actually I did a repair install and it worked. It didn't erase my hard drive or anything. Of course I had to install sp2 again and all the updates, but everything is now back to normal!

:lol: Well thats good then. :lol: Glad to see that you got it fixed.. B)

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