HP Pavilion dv7 4050-sg

Hi guys,

i have a problem with this notebook: https://h10025.www1.hp.com/ewfrf/wc/product?cc=us&dlc=en&lc=en&product=4207752

a friend of mine didnt need it anymore, he said he had some problems with it so he buyed a new one and because i was in need of a notebook he gave it to me

so heres the problem:
the hard drive had a problem so i completly formated it and installed windows 7, everythings works fine except installing the graphic driver, i will list u a couple of tests i've done


test 1:
clean windows 7 installation -> only graphic driver from windows update -> restart -> works
problems:
sleep mode -> freezes at login screen after resume
restart again -> freezes before entering the login screen but after windows logo
conclusion: only works once as long i dont shut down or put notebook in sleep mode, after that i need to go into safe mode -> uninstall graphic driver -> install it again -> see above

test 2:
clean windows 7 installation -> installed graphic driver from hp -> restart -> stays some seconds in login screen then freezes
conclusion: graphic driver doesnt work at all

test 3:
clean windows 7 installation -> installed graphic driver from hp with this modification: Bug Or Feature? AMD's Catalyst Doesn't Recognize NB Driver : Installed Or Not? + installed the atipcie.sys manually -> restart -> at login windows says: "graphic driver crashed but was able to recover" -> works
problems: same as test 1, moreover i can not switch graphics from discrete to gpu
conclusion: sucks again

test 4:
clean windows 7 installation -> installed newest graphic driver from amd -> restart -> stays some seconds in login screen then freezes
conclusion: graphic driver doesnt work at all


i did a lot of more tests combining drivers or trying to install them manually, but i didnt change any of the outcomes above ... so, plz help me guys!