old static ipv6 address can't be removed

In server, during ipconfig, I can see two static ipv6 addresses.  I manually modify the only one ipv6 address, but the previous one is still kept inside the server without going away after reboot.  There is no multiple ipv6 addresses in the NIC.  The phantom ipv6 address is fe80::b47f:ba23:92e8:9c8%11.  Is the format correct?  How can I remove the phantom ipv6 address?
riowgAsked:
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Mike ThomasConsultantCommented:
The only suggestion I have is to disable ipv6 if you do not need it http://support.microsoft.com/kb/929852

If your network is ipv6 capable and you need ipv6 delete the key, it might have cleared the problem for you.
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riowgAuthor Commented:
Because I will set up Exchange 2007 in this server, I am afraid if removing ipv6 will be harmful to the future Exchange 2007 server.  What should I do?
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Mike ThomasConsultantCommented:
I run server 2008R2 and Exchange 2010, you do not need ipv6, if your network switches are not ipv6 capable you don't use it anayway, it just gets in the way.
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riowgAuthor Commented:
Removing ipv6 seems completed, but I found there're some errors come from the server.  The ipv6 without scope in DHCP still exists.  Don't know how to remove it.  Removing ipv6 is good before adding roles to the server.  I'm now unsure if I should keep this removal of ipv6.
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Mike ThomasConsultantCommented:
Untick the  ipv6 box in the network properties for the card, any service bindings should soon disapear.
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riowgAuthor Commented:
Had unchecked it before modifying the registry.  
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Mike ThomasConsultantCommented:
Ok can you list the stores you are seeing?
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riowgAuthor Commented:
Sorry, I'm now not in the office, but I will continue the configuration next Monday.  Thanks.
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riowgAuthor Commented:
workstation also needs to be restarted for the changes of this in server
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