I was using the driver provided by Dell before.But yesterday I install the official 13.12 driver then the Control Center doesn't work.
So I uninstalled the 13.12 driver and used the DriverSweeper.
After these I installed Dell driver again but everything is like this↓
I uninstall+driversweeper dell driver and use official 13.12 still the same problem
now I can't use Steam,Flash,Blizzard desktop and so many things.
PS:I have no os disc to repair my os