I have AMD Radeon HD 7400M series 1 GB graphics processor in my HP pavilion dm4 laptop PC with Intel i5 processor and 6 GB Ram. since I updated from Windows 7 to Windows 10, I can see the option of switchable Graphics. I have updated the Drivers. Current driver installed is "15.200.1062.1004". I contacted Microsoft Support. They uninstalled and reinstalled the driver but that did not solve the issue. MS support came to conclusion that the switchable graphics option was not included in the driver package. Please let me know how I can fix this.