How to delete all volume shadow copies ?

In my case server was running out of free space on system partition, and in order to free some space I wanted to delete volume shadow copies. Server was running on Windows Server 2003. One way to delete all volume shadow copies with confirmation is using vshadow.exe:

vshadow.exe -da

More on how to use vshadow.exe on http://msdn.microsoft.com/en-us/library/windows/desktop/bb530725(v=vs.85).aspx .