i have dell inspiron 15r 5537 with Intel processor core i7 4500u with integrated graphic gpu hd 4400 & amd radeon hd 8850m after i setup the latest drivers for intel graghic and amd graphic i can't find the catalyst install manager icon or the run,exe anywhere neither on screen customization nor on start programs when i tried to setup the driver again it tells me the catalyst install manager already exist , i use windows 7 64bit ultimate how can i fix this issue