The Windows Powershell is Microsoft's new object-oriented .NET shell. It's more powerful than the standard cmd. You can download it for free.

For security resasons script execution is disabled by default. In order to execute scripts you have to enable ist manually. Notice that this may result in security hazard if not used carefully.

set-executionpolicy unrestricted

to disable script execution again, use the following command:

set-executionpolicy restricted