Register new managed account problem

When i try to register managed account it is showing me the following error and not possible to create the managed account

The specified user 'accountname' is a local account. Local accounts should only be used in stand alone mode.

Solution:
If you are trying to add a new managed account using a local account, you can perform this task via PowerShell.

Right click on SharePoint 2010 Management Shell > Run as Administrator
In the PowerShell window - type: $cred = Get-Credential
You will be prompted to enter an account and password (here you can type in a local account)
Back in the PowerShell window - type: New-SPManagedAccount -Credential $cred
Even though the warning appears, the account is added.