Change the way users log on and off - disabled

I have a problem enabling the fast user switch as when I click on it a warning message pops uop saying the following:

A recently installed program has disabled the Welcome screen and Fast user switching. To restore these features, you must uninstall the program. The following file name might help you identify the program that made the change: gina_x86.dll

Now, this happened only after installing Windows XP and therefore no programs were installed yet and to prove this when I try opening the "Add or Remove programs" there is nothing there, completely blank. So now each time I can't switch from a user to another, each time I have to log off the user and type manually user name and log in. Is there any solution to this?
Nicola SiottoDirectorAsked:
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jhanceCommented:
This is the only MS KB article I located on this topic:

http://support.microsoft.com/default.aspx?scid=kb;en-us;817142

But it seems to be only applicable to Symantec PC Anywhere.

Are you SURE you didn't install something else?  I'm suspicious because the standard GINA for Windows XP is named "MSGINA.DLL".  This "GINA_x86.DLL" is not a Microsoft DLL and seems to have been installed to replace your standard GINA.

Perhaps a VIRUS??  Malware/SCUMWare?

Try a virus scan.  Try running AdAware.

Perhaps someone ELSE installed something here??
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jhanceCommented:
Here is a link to an article that references this "GINA_X86.DLL" file:

http://www.jsiinc.com/SUBA/tip0400/rh0429.htm

It seems that this file IS INDEED a 3rd party GINA that you (or someone or something) has installed on your system.

Unless you did this, I'm not very suspicious that a virus or trojan has infected your system, has replaced your GINA (GINA is the LOGON subsystem for Windows), and is in a position to capture your logons and password.

I recommend that you get to the bottom of this file and where it came from ASAP!
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Nicola SiottoDirectorAuthor Commented:
Thanks but that's not my case, I don't have PC Anywhere installed although I have Norton Antivirus and Antispam but they were installed after I got this issue the first time.
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Nicola SiottoDirectorAuthor Commented:
I am trying so jhance, thanks.
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sramesh2kCommented:
I too believe Q817142 should work in this case.

Automated fix:
Use MVP Doug Knox's utility to fix the Welcome screen.
http://www.dougknox.com/xp/scripts_desc/fix_xp_logon.htm
[Fix Logon/Restore Welcome Screen]. This should reset the default GINA in registry.
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Nicola SiottoDirectorAuthor Commented:
sramesh2k,

it worked perfectly, thanks.
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sramesh2kCommented:
Most welcome, nsiotto.

BTW, a fair grading would be to share the points to both as we both gave the exact answer for this problem.
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Nicola SiottoDirectorAuthor Commented:
Well I needed a practical solution and not only a diagnosis of my problem and although I have received a good response by jhance it did not solve my problem immediatelly, that's why I gave the points to you.
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sramesh2kCommented:
Thanks, nsiotto
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Nicola SiottoDirectorAuthor Commented:
Welcome
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