I think there is a last chance: your Windows 7 is a modified/"optimized" version, so it does not contains all the required files, there are posts about this issue, also setupapi file can help to diagnose the problem.
I think there is a last chance: your Windows 7 is a modified/"optimized" version, so it does not contains all the required files, there are posts about this issue, also setupapi file can help to diagnose the problem.