Hi,There is no need of going in deep down of your System OS.Download iObit Driver Booster 2.1 or the Latest version,Make it into PRO (Get the Key from Youtube) and Install It.Now at the First start of it,It will scan for Missing,Damaged,Outdated and Corrupted Drivers and It will get Downloaded and Quietly Installed Automatically.This must fix your Problem.This is a Safer way to Deal with this Problem.Please inform me the Result after doing my Steps.Thanks.