Henry,   Go to Drivers & Downloads enter your service tag, then select your operating system. Under applications, download and install Dell QuickSet and see if the applications reappear.   If this is Windows 7... Start, control panel, device manager. Do you see any yellow exclaimination marks or red x's   If this is Windows 8... Hit the Windows key and the x keys at the same time, device manager Do you see any yellow exclaimination marks or red x's     Rick
I received my laptop on Christmas day, the Dell Inspiron 15R SE, and to activate Bluetooth and other options i could press a button with cogs on above the keyboard which brings up the windows mobility center. This allowed me to activate and deactivate Bluetooth easily and this worked for around 4 day. However after that half of the options (which were on the bottom of the window) have now gone, so the Bluetooth toggle has gone, as well as other Dell options such as the 'Express Charge' toggle. I don't know if i have changed some settings or how i can get these toggles back?  Henry.
Windows Mobility Center icons have gone.