Help my ctrl-alt-delete box has gone haywire.

Has anyone seen this.. I am wondering if I have a virus of some kind. My Ctrl-alt-delete box no longer has a tab allowing me to switch back and forth to see who is hogging my stuff and no longer then can delete those mothers... I do not even have a close box anymore... I must use the escape to kill the box... it is a real pain... any idea would be greatly appreciated.. my virus protection is not finding anything wrong...
Here is an image if you want to take a look...52payperclick dot com/ctrl-alt-delete-box.png
Oh.. its windows XP home if that matters....multimedia center.. I know i am really outdated...

Thanks in advance.

 

could not view your image

do the following:


Download, install, update and do full scan with these free malware detection programs:

Malwarebytes (MBAM): http://www.malwarebytes.org/products/malwarebytes_free
SUPERAntiSpyware: (SAS): http://www.superantispyware.com/

Remove all found, reboot, and run again until scans run clean, these can be removed afterwards if you so choose.

post back after scans run clean

what antivirus are you using?