Check out Games For Windows Live. it is PC gaming and it uses the Live service. So what you would need to do would be to go to the link below and click on the Download the Games for Windows Client at the bottom of the page and then when it is downloaded
you can install the client and you can use a new Live ID or you can use the same Live ID you use to login to Xbox Live. As it uses the same service. Check out the link below for more info.
Ok as of right now the only thing available for PC that uses the same Live service as Xbox live is Games for Windows Live. Try looking up info for Windows 8 and Xbox live I think you will be happy with what you find. :-D
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