Unable to login Windows XP due to LongonUI.exe Application Error

[QJ]

Hello,

My PC was hang after a newly downloaded screen saver
kicked in for more than one hour. Only thing I can do was
power-off the PC. When re-starting the PC, Logonui.exe
Application Error is displayed: The memory could not be
"Read". After OK several this message, a small user login
screen displays. However, when I typed in password and
click the login button, Userinit Logon Application Error
screen occurs. I could not bring in anything to screen
except background and Screen Saver.

Can anybody help me get into the PC?

Thanks in advance.

 

[Malke]

Hello,

My PC was hang after a newly downloaded screen saver
kicked in for more than one hour. Only thing I can do was
power-off the PC. When re-starting the PC, Logonui.exe
Application Error is displayed: The memory could not be
"Read". After OK several this message, a small user login
screen displays. However, when I typed in password and
click the login button, Userinit Logon Application Error
screen occurs. I could not bring in anything to screen
except background and Screen Saver.

Try to get into the computer by using Safe Mode (repeatedly tap the F8
key as the computer is starting up to get the right menu). Once there,
scan with your current antivirus using updated definitions.

Malke

 

[Guest]

Malke, thank you for your help

I was trying to login Windows with Safe Mode, but encountered the same errors as at normal mode. Then I tried to bring up task manager. Through there I was able to bring back desktop. However, Norton AntiVirus in PC is not functioning. I tried to re-install it but got MSIEXEC.exe application Error. When I access any item in control pannal, RUNDLL32.exe error occurs

Right now the most applications in my PC do not work. I would like to know what I can do to solve the problems. Is there DOS version Antivirus utility I can use

Thank

-Q

 

[Malke]

Malke, thank you for your help.

I was trying to login Windows with Safe Mode, but encountered the same
errors as at normal mode. Then I tried to bring up task manager.
Through there I was able to bring back desktop. However, Norton
AntiVirus in PC is not functioning. I tried to re-install it but got
MSIEXEC.exe application Error. When I access any item in control
pannal, RUNDLL32.exe error occurs.

Right now the most applications in my PC do not work. I would like to
know what I can do to solve the problems. Is there DOS version
Antivirus utility I can use ?

Hi, QJ. It certainly sounds like you've got a virus that immediately
breaks any av installed. This could happen if you had an older
antivirus version, weren't updating its definitions or didn't renew
your subscription. If your XP installation was done with FAT32 (DOS
won't see NTFS partitions), you could try F-Prot for DOS, but the usual
way to deal with this is to:

1) Take the infected machine off the Internet and any lan immediately.
2) From a different, clean machine download Stinger here:

(http://vil.nai.com/vil/stinger/)

and run it in Safe Mode. Stinger is a limited virus checker, but its
advantage is that it is standalone and doesn't need to be installed.
3) Hope that Stinger cleans up the machine enough to be able to
reinstall your av or install a new, current one. Update its definitions
and do a full scan.
4) Continue the cleaning process by removing any spyware with Spybot
Search & Destroy (http://www.safer-networking.org) and Ad-aware
(http://www.lavasoftusa.com). Be sure to update these programs before
running them. These programs are free, so run them both since they
complement each other. It is best to run antivirus and spyware removal
tools in Safe Mode.

Now, if you can't even run Stinger, you might try booting with a current
av like Norton. You'd want the most current one out there so if your
version isn't 2004, you need a newer one. If all that doesn't work,
then you can either 1) take the machine to a good local computer repair
shop and see if they can clean it up; 2) format the drive, reinstall
Windows, reinstall programs from cd's, restore data from backups.

Good luck,

Malke

 

[Guest]

Malke

Thank you very much for your advice. My PC finally comes back

After running Stinger, Betal.n@mm is detected. More than 100 files were contaminated by the virus, including av files and other system files. As you suggested I upgraded my Norton av and downloaded Spybot and Ad-aware. Those utilities removed 300 some files from my pooly maintained PC. What a mess

This incident really teaches me a lesson. I'll keep your e-mail as the Bible and clean up my PC routinely

Thanks again and Have a good weekend

-Q

----- Malke wrote: ----

QJ wrote

Malke, thank you for your help
errors as at normal mode. Then I tried to bring up task manager
Through there I was able to bring back desktop. However, Norto
AntiVirus in PC is not functioning. I tried to re-install it but go
MSIEXEC.exe application Error. When I access any item in contro
pannal, RUNDLL32.exe error occurs
know what I can do to solve the problems. Is there DOS versio
Antivirus utility I can use

Hi, QJ. It certainly sounds like you've got a virus that immediatel
breaks any av installed. This could happen if you had an olde
antivirus version, weren't updating its definitions or didn't rene
your subscription. If your XP installation was done with FAT32 (DO
won't see NTFS partitions), you could try F-Prot for DOS, but the usua
way to deal with this is to

1) Take the infected machine off the Internet and any lan immediately
2) From a different, clean machine download Stinger here

(http://vil.nai.com/vil/stinger/

and run it in Safe Mode. Stinger is a limited virus checker, but it
advantage is that it is standalone and doesn't need to be installed
3) Hope that Stinger cleans up the machine enough to be able t
reinstall your av or install a new, current one. Update its definition
and do a full scan
4) Continue the cleaning process by removing any spyware with Spybo
Search & Destroy (http://www.safer-networking.org) and Ad-awar
(http://www.lavasoftusa.com). Be sure to update these programs befor
running them. These programs are free, so run them both since the
complement each other. It is best to run antivirus and spyware remova
tools in Safe Mode

Now, if you can't even run Stinger, you might try booting with a curren
av like Norton. You'd want the most current one out there so if you
version isn't 2004, you need a newer one. If all that doesn't work
then you can either 1) take the machine to a good local computer repai
shop and see if they can clean it up; 2) format the drive, reinstal
Windows, reinstall programs from cd's, restore data from backups

Good luck

Malk

 

[Malke]

Malke,

Thank you very much for your advice. My PC finally comes back.

After running Stinger, Betal.n@mm is detected. More than 100 files
were contaminated by the virus, including av files and other system
files. As you suggested I upgraded my Norton av and downloaded Spybot
and Ad-aware. Those utilities removed 300 some files from my pooly
maintained PC. What a mess!

This incident really teaches me a lesson. I'll keep your e-mail as the
Bible and clean up my PC routinely.

Thanks again and Have a good weekend.

Thanks for letting me know the solution, QJ. Yes, certainly you should
bow before me, the Empress of the World ;-) NOT! I'm glad you got
everything sorted out.

Have a nice weekend and enjoy your clean computer!

Malke

 

[Deki]

Help!!!

Well hey guys....i recieved this problem too....now i downloaded the programs you provided and runned scans and found viruses. i deleted them all....and then i started to install programs and rebooting and everything was fine. After a while about a few hours later i had rebooted my computer and on startup i had to login and when i logged in ll i could see was my backround and i got a Data Execution Prevention for Logon UI.....i system restored and now i running scans again. Please help this thing wont go away.....my comp was fine when i first cleaned it a few hours later it was back.......

Thank you

And ASAP PLEASE!!

 

[yes1]

Hi Deki, u can right click your "My Computer", and click at the "Properties", select the "Advance" on the System Properties, Choose the "Settings" on the Performance, and you will see the "Data Execution Prevention", Choose the "Turn on DEP for all programs and services except those i select:", i think it can solve your problem!!

Good Luck
Yes1

 

[vickypandya]

Problem with starting the computer

hey..malke..
i hv also d same problem..but d thing is i my computer is not even starting in safe mode.
so can u tell me wat to do..??
please reply asap....
thanks....


vikas...

 

[nero_0221]

Help me find the solution please...

I'm having the same problem also here...which is that after I start my system, then I reach to the login part...I've read other post which say they could see the login screen or background...but mine turns out nothing...just a black screen and only a mouse pointer there...I've already tried to boot it and nothing seems to work....what should I do? thanks for helping

 

[jordan s]

Same problem

i am having this same exact problem except i still cannot enter safe mode, whenever i try i get the same error message and i cant figure out how to get around, if somebody could please help me asap.