License status show whether the windows vista client is activated (“licensed”) in the grace period or unlicensed. If the status displays “unlicensed” the windows vista client cannot be logged onto until activated.
To determine license status
1. Launch a command window with the elevated privlidges (right-click, run as administrator).
2. Specify KMS by running the following script: cscript %windir%\system32\slmgr.vbs -dli
Run the command prompt in administrator mode by using the browser to navigate to your windows \system32 directory, and then right-click the CMD.exe file and select “run as administrator”