type control.exe into your "start search" box - that should start the control panel, unless a virus has modified things.
You can go directly to these common functions within the Control Panel:
start cmd Function
appwiz.cpl Add/Remove Programs
hdwwiz.cpl Add hardware
ncpa.cpl Network properties
nusrmgr.cpl User accounts
powercfg.cpl Power configuration
sysdm.cpl System properties