Windows logs in and immediately logs out

[alternate]

I cant't log in. After entering username and password appears that
"Loading your settings" window, then just after loading settings (I
think they are loaded successfully: for instance appearance and colors
of window change and "Welcome" sound plays) appears window "Saving your
settings". And session finishes. This happens for any user account.
Perhaps something that is started by Windows cause it to log out. I was
able to find a tool and removed everything from "Run", "RunOnce", etc
(only in HKEY_LOCAL_MACHINE). Nothing changed. How can I determine what
caused such behaviour or fix it?

 

[WTC]

I cant't log in. After entering username and password appears that
"Loading your settings" window, then just after loading settings (I
think they are loaded successfully: for instance appearance and colors
of window change and "Welcome" sound plays) appears window "Saving your
settings". And session finishes. This happens for any user account.
Perhaps something that is started by Windows cause it to log out. I was
able to find a tool and removed everything from "Run", "RunOnce", etc
(only in HKEY_LOCAL_MACHINE). Nothing changed. How can I determine what
caused such behaviour or fix it?

This should help you.

You cannot log on to Windows XP after you remove Wsaupdater.exe
http://support.microsoft.com/?kbid=892893

 

[Ramesh, MS-MVP]

Visit http://www.winxptutor.com/wsaremove.htm and see section "Unable to
logon to Windows after removing BlazeFind using a spyware removal utility?"

Unable to Log On To Windows XP After Removing wsaupdater.exe:
http://www.lavahelp.com/articles/v6/04/06/0901.html

Incorrect Userinit value in the registry is known to be the cause:
http://www.lavasoftsupport.com/index.php?showtopic=29752

BlazeFind Removal
http://rickrogers.org/fixes.htm#Blazefind

How to edit the registry offline using BartPE boot CD ?:
http://windowsxp.mvps.org/peboot.htm

Other Possibilities - Driveletter problem
-----------------------------------------

Unable to Log on if the Boot Partition Drive Letter Has Changed:
http://support.microsoft.com/kb/249321/

How to restore the system/boot drive letter in Windows:
http://support.microsoft.com/kb/q223188/

--
Ramesh, Microsoft MVP
Windows XP Shell/User

Windows XP Troubleshooting
http://www.winhelponline.com