xps l502x missing software and bluetooth is constantly on

Hi, I sent the message below to Dell's facebook page, I was wondering if anyone knew any solutions to this problem I'm having with my laptop. 

Hi, I would like to ask for help with my xps 15 l502x laptop with windows 7. While trying to search for a way to turn off my bluetooth, I saw a picture on the dell community support forum of the windows mobility centre and saw that mine was slightly off.

This is the image below from the forum -

http://en.community.dell.com/resized-image.ashx/__size/550x0/__key/communityserver-discussions-components-files/3324/0083.windowsmobilitycenter.jpg

For the bluetooth, the 'turn off' function is gone and replaced with 'launch'. The touchpad section is completely gone and the short key only turns on the touchpad light, but does not disable it. I think this may have to do with my laptop crashing about two years ago. It was fixed under its warranty that has now run out. However, after it was fixed, I noticed that some of the programs and functions were disappearing and the new battery I received died after six months.

I have updated the drivers but these and other functions are still missing. And with the laptop being prone to freezing on simple tasks and overheating, I am left thinking that these problems may be connected and whether there is a way to fix it.