Hi,
Startup repair will fix this issue. This website explains in detail.
http://pcsupport.about.com/od/operatingsystems/f/repair-installation-windows.htm
Checkout this link :-
To contact Microsoft Customer Service and Support, telephone (800) MICROSOFT (642-7676).
In Canada, call (877)568-2495.
Microsoft Customer Service hours of operation:
Monday through Friday, 5:00 AM - 9:00 PM Pacific Time
Saturday and Sunday, 6:00 AM – 3:00 PM Pacific Time