Dell question

LOST MY CONTROL PANEL APPLICATIONS__DO NOT HAVE C:WINDOWS/SYSTEM32/RUNDLL32.EXE
http://answers.microsoft.com/en-us/windows/forum/windows_xp-hardware/lost-my-control-panel-applicationsdo-not-have/ccae2258-e043-4408-adf0-c054762d2229

This should help restore the add/remove programs
Restore the Control Panel, line 256; left - http://www.kellys-korner-xp.com/xp_tweaks.htm

The problem may habe been caused by malware so also scan your system with at least two security applications your antivirus included... best antimalwares I can think of are Malware Bytes AntiMalware, Super AntiSpyware