Hi anuj chopra, Welcome to the Community. I just saw  your post and I hope it is resolved by now. Please install the Quick Set application using this link to fix the issue with Windows Mobility Center: www.dell.com/.../DriverFileFormats Kindly reply if the issue was resolved.
hi,  i have a dell xps15 L501X laptop, i formatted my hard drive for the first time on july 8th 2012 after buying it in dec 2010. now the options in the windows mobility center has reduced to 6 which i remember was 12 prior to formatting. also even after installing realtec audio drivers , the shortcut keys above the keyboard is not working. windows mobility center fix is urgently required as i am not able to play cs1.6 because i have to press fn+f1/f2 to buy things which earlier was much easier. earlier the mobility center had options for changing multimedia keys to fn keys please help- anuj
windows mobility center options reduced to 6 from 12