XP Pro logon screen appears twice - is this a trojan?

[Graham Morris]

Suddenly my logon screen is appearing twice: I have to put in the username
and password in both times to log on to my XP Pro system (in a domain). I'm
a bit worried that a trojan has stolen the name and password, but googling
hasn't produced anything and the virus scan (McAfee) shows nothing.

If the OS prevents anything except the proper login running when I press
Ctrl/Alt/Del, then perhaps the second appearance is a trojan? However I
have to put in the correct name and password the second time. (Of course it
could be a clever trojan that has collected the credentials the last time I
logged in and is checking against them).

Anyone seen this? Should I (groan) reinstall the OS? Or can I ignore it?

 

[JBrunelle]

Suddenly my logon screen is appearing twice: I have to put in the username
and password in both times to log on to my XP Pro system (in a domain). I'm
a bit worried that a trojan has stolen the name and password, but googling
hasn't produced anything and the virus scan (McAfee) shows nothing.

If the OS prevents anything except the proper login running when I press
Ctrl/Alt/Del, then perhaps the second appearance is a trojan? However I
have to put in the correct name and password the second time. (Of course it
could be a clever trojan that has collected the credentials the last time I
logged in and is checking against them).

Anyone seen this? Should I (groan) reinstall the OS? Or can I ignore it?

Have you tried scanning for any viruses? Go to trendmicro.com and
search sysclean. That method is a pretty thorough exam on your files.
Try it, and see if it found anything. Also, follow the instructions,
run it in safe mode for best results.

 

[Graham Morris]

The problem seems to have gone away after a reboot, so perhaps it was just a
false alarm.