Hi , I follow this steps http
/www.tomsguide.com/forum/id-1590857/downgrading-samsung-np365e5c-s01us-windows.html
I erase all my partition , and then i make a clean install with windows 7, the windows and the drivers works all fine, the problem i have is when i start the notebook THE only way that boot is pressing F10 and then select boot , i try all things but i can't do start only the start booton, What can i do ?

I erase all my partition , and then i make a clean install with windows 7, the windows and the drivers works all fine, the problem i have is when i start the notebook THE only way that boot is pressing F10 and then select boot , i try all things but i can't do start only the start booton, What can i do ?