If the error message is "Failed to open Mpic config file." This occurs when trying to login to NOW. This issue occurs on the Windows 7 and Windows 8 PCs.
To resolve this error, you need to give 'Administrator Rights" on Now.exe to run the same. Here are the steps to do so.
Steps to resolve the problem
Right click on 'Launcher Now' from your desktop
Click on 'Open File location'
A folder will open where in you need to select 'Now.exe'
Right click on 'Now.exe' and click on properties
Select 'Compatibility' Tab
Select 'Change settings for all users'
Check 'Run this program in compatibility mode for:'
Check 'Run this program as an administrator'
Click 'OK'
Click 'Apply' and 'OK'
Conclusion
You should be able to run NOW.exe after following the above procedure