Debugging issue on AX 2012R2

Dear All,

I am having the following issue with debugging.

When I am trying to open the debugger window it is giving a error message saying that 'The X++ debugger work only for users who are in the 'Microsoft Dynamics AX Debugging Users' local group of the Windows.'

I have created a new configuration, enabled the checkbox for X++ debugging too. Also I have selected the debug mode to 'When Breakpoint' under Tools>Options>Development and also unchecked the Execute in CIL checkbox, Still the issue remained unsolved.

I searched and found out that I have to add my AOS Service Account under the Local Users and Groups inside the 'Computer Management'. But inside the same I can not find anything like 'Local Users and Groups'.

How do I solve this issue. Pls help.!