1. Go to Start menu , Click to Run
2. In Run diolouge box type "gpedit.msc " and press enter
3. You will get screen as shown below [click on image to see in large size.]
In above dialogue box Click to user configuration then Administrative Templates then Control Panel in right pane you will get "Prohibit access to the control panel". Just double click on it.
4. You will get one more dialogue box as shown below. Select enabled and click to ok
Thats it ..., Now check your control panel. Is it there ?
If you want to get back your control panel then follow the same steps at only last stage you have select disabled .
any doubt ??? feel free to ask me.