1. Create Command Prompt shortcut.
To create Command Prompt shortcut in windows 7
Go to Start->All Programs->Accessories.And right click on Command Prompt and select Send to->Desktop (create shortcut)
2.Right click on Command Prompt shortcut and select properties and then select Advanced button on the Shortcut tab.
3.Select the Run as administrator box and click Ok button.And then click OK button in Properties windows button.
4.Just Open the Command Prompt shortcut to Run Command Prompt as an Administrator
If you’re a frequent Command Prompt user,then this will help you to save your time.
Another method:
Go to Start->All Programs->Accessories.And right click on Command Prompt and choose Run as administrator.