Windows 7 HomeGroup Issue

[Airbander]

Hello

I have a laptop that i re-imaged with windows 7 ultimate and it wont join to the HomeGroup
no matter what i do it wont.

So i give my laptop static ip did not work
Renamed it did not work
disabled Ipv6 and then try it finally ask me to Join the HomeGroup but it wont because it needs Ipv6 to be enabled
Enabled Ipv6 it wants to create a HomeGroup
Rebooted all computers in my network and switches and routor and modem no luck

what i see is that this laptop when it connect to my home network it thinks it is a new network and it get spreated from rest of my network all other devices get added with no problems

I have
Win xp 32
Win8 Pro media center 64
win8
Windows 7 Ultimate 64bit
2 roku
1 chromcast
2 iphone
1 ipad 2
ps3
wii
ps2
and some other devices that all communicating fine with windows 7 HomeGroup that was created 2 years ago

This pc in question was part of homegroup under same CD of windows 7 OEM that came with it
Not sure why now i have this issue i re-images this pc at lest 5 times in last 2 years and no issue at all
no network changed nothing happend

before yesterday my wife got windows 8 and it join the homegrop with no issue


Can someone advise

Thanks

 

[ThrashZone]

See if this thread helps,
http://www.sevenforums.com/network-sharing/303967-ho-do-i-set-up-new-homegroup.html#post2524498
It sounds like you have two machines with the same name which can not happen and be successful.