hi all! im new here.Well i got a problem.First of all i got lenovo legion y520 i7 7700hq with windows 10.I want to open a 2nd oparation with windows 7 (personal reason) i tried everything but everytime a (no device drivers were found.Make sure that the installation media contains the correct drivers , and then click ok) stops me.It shows no drivers i dont know why.Any help?