Windows XP keeps logging off!

When I try to entre the computer, inserting password on the Welcome Screen, it enters and then it keeps logging off, just seeing the background screen for some seconds.
I have installed Norton and might deleted some adware that was asked in the virus search!
I don't have windows CD as this is a pre-installed version in the Sony Vaio.
I have tried to start as administrator, but also keeps logging off!
I have tried to start on every mode, from last known configuration to safe mode  through safe mode with everything and without them!!!
Nothing!!
I came accross some explanation on the internet to change the registry, but I can't even log to anything!
Is there any program I can download that I could boot from a CD and then fix teh problem?

Thank you very much.

Kind regards
filipenascimentoAsked:
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johnb6767Connect With a Mentor Commented:
Can you access this machine's registry from another system on the network?

If so....

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Userinit=C:\WINDOWS\system32\userinit.exe,     <~~notice the comma....

while youre in there...

shell=explorer.exe
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Shanmuga SundaramDirector of Software EngineeringCommented:
Though there are many suggesitions to come out of this, nothing helps. I say this to you because, I tried to resolve the same issue that i faced. Better try backing up your data and do a fresh install. or else lets hope better luck to you to solve this issue.
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filipenascimentoAuthor Commented:
That hit me in the eye!
I can't have a solution? It is very difficult for me to erase all data!
Thank you  shasunder!
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_Forgotten_Commented:
Sounds like you need to run a system restore.  If you can get to the recovery console, I will post a script you can run.
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filipenascimentoAuthor Commented:
Hi,
nope, it asks me for the passwd! And then it comes again...!
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johnb6767Commented:
Can also check out these values by booting into UBCD4Win, or BartPE. Please advise if you need assistance...
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filipenascimentoAuthor Commented:
Thank you John6767,

This computer is disconnected from network, is there any way to boot from a CD and then enter the registry?

kind regards,
FN
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johnb6767Connect With a Mentor Commented:
What is the Ultimate Boot CD for Windows?
http://www.ubcd4win.com/

Bart's Preinstalled Environment (BartPE) bootable live windows CD/DVD
http://www.nu2.nu/pebuilder/

Load your regedit, and then go to File>Load Hive....Navigate to c:\windows\system32\config\ and load the system hive....Then follow the key structure....
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filipenascimentoAuthor Commented:
I will try this.

Thank you very much!

Get back to you in a while.
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_Forgotten_Commented:
the passwoord for the recovery console is probaby blank.  Try no password
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filipenascimentoAuthor Commented:
Hi John,

Done all the requested actions, still the same.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Userinit=C:\WINDOWS\system32\userinit.exe,     <~~notice the comma....
and also...
shell=explorer.exe

Could you advise please?

Kind regards,
FN
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McKnifeCommented:
Could be http://support.microsoft.com/?kbid=249321 (applies to xp as well)
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filipenascimentoAuthor Commented:
Hi Guys,

Thanks... Got It!!!

I was being lame... Thanks a lot Johnb6767!
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johnb6767Commented:
Got it fixed? Which part was it?
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filipenascimentoAuthor Commented:
As you told.
I was only forgeting to unload the system hive to save changes.

Kind regards,
FN
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