1.  先删除Virtualmachine

2.   在Visual machines 的images/disks中删除相应关联

3.   在storage中删除相对应的storage(该storage中包含VHD)

在执行第3步的时候参考:

Error
deleting VHD: There is currently a lease on the blob and no lease ID was specified in the request(http://social.msdn.microsoft.com/Forums/en-US/WAVirtualMachinesforWindows/thread/7381ea0e-0443-4b33-aa12-ba39df003409/)