To open control panel from Task Manager,click on New task [run] and type "control" without quote

For more specific command,
Accessibility Options -----control access.cpl
Add New Hardware -----control sysdm.cpl add new hardware
Add/Remove Programs -----control appwiz.cpl
Date/Time Properties -----control timedate.cpl
Display Properties -----control desk.cpl
FindFast -----control findfast.cpl
Fonts Folder -----control fonts
Internet Properties -----control inetcpl.cpl
Joystick Properties -----control joy.cpl
Keyboard Properties -----control main.cpl keyboard
Microsoft Exchange -----control mlcfg32.cpl
Microsoft Mail Post Office -----control wgpocpl.cpl
Modem Properties -----control modem.cpl
Mouse Properties -----control main.cpl
Multimedia Properties ----- control mmsys.cpl
Network Properties -----control netcpl.cpl
Password Properties -----control password.cpl
PC Card -----control main.cpl pc card (PCMCIA)
Printers Folder -----control printers
Regional Settings -----control intl.cpl
Scanners and Cameras -----control sticpl.cpl
Sound Properties -----control mmsys.cpl sounds
System Properties -----control sysdm.cpl