8- HOW TO SOLVE PROBLEM, SERVER SECURITY CERTIFICATE IS NOT YET VALID

Click on Start Menu and then control penal. 
Open Date/Time setting 
Adjust correct date and time according to your region. 
Open "Internet Time Zone" tab.  
Click on "Update Now" button. After clicking on button, It will start synchronzing your internet server timing. 
After 7-8 seconds you will see a message, "The time has been successfully synchronized with time.windows.com on 07-07-2013 at 5:09PM.