Problem in Bluetooth inspiron n5110

i have dell inspiron n5110 but i can't send or receive any data from my laptop via Bluetooth and when you go to device manager i can't see any Bluetooth device

(it's invisible Suddenly!! it's in first time install it  i see in complete install and then in yellow mark and it's disappear) 

when i search for add devices in control panel i see Error in definition form my Bluetooth device

When visiting website dell learned at that must be installed the driver in correct order 

- that's my problem only ?
- and Is it necessary to re-install my operator system or not   to install my Bluetooth?
- i have windows 7  64-bit 

thank you for your time