Microsoft Windows XP [Version 5.1.2600] (C) Copyright 1986-2001 Microsoft Corp. C:\WINDOWS>netsh interface ipv6 delete prefixpolicy ?
Usage: delete prefixpolicy [prefix=]/[[store=]active|persistent]
prefix - Prefix for which to add a policy.
store - One of the following values:
active: Deletion only lasts until next boot.
persistent: Deletion is persistent (default).
Remarks: Deletes the source and destination address selection policy
for a given prefix.
delete prefixpolicy ::/96