the gamertag i want to use is k9o and the gamertag is not in use but it wont let me use it
sir deco hey there :)
Although this gamertag is not being used on Xbox 360, it may be being used on another Xbox LIVE related service (such as Games for Windows). If a gamertag is being used on any Xbox LIVE service, then by default, the gamertag will become unavailable across the service as a whole.
I hope this helps.
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Xbox Gamer Me Gamerkitten