Hello Frnds..Sometime you will find that your window is not starting properly whether by your software installtion or by misunderstanding of file function.So dont worry here are the simple steps to fix window missing file.
Here's How...
EASY Method:
1.Restart your PC.
2.Keep Pressing the F8 button until the menu appears.
3.When the menu appears the select the "Last Known Good Configuration" file.
4.Once Select Press enter.
5.Restart the pc and the problem has been resolved.