“Personalize” option missing from the dropdown menu.

Hello,
I have just gotten my laptop pre installed with Windows 7 Home premium.
The desktop wallpaper is the standard blue one with the Windows sign on it.
But when I tried to change it I couldn't find the personalize button in order to do so.
I'm not sure if I just don't know where it is, or is it actually missing?
If it is missing is there a way of bringing it back.
Also, I'm not sure if other features are missing as well, I'm not able to find, hopefully there aren't any missing.
Thanks,
Umren51
