I'm guessing that you mean you purchased the original Fable off of the XBOX LIVE Marketplace. The freezing is most likely a result of the emulation software the XBOX 360 uses to run the original XBOX games. Not every game works perfectly on this software
(for example, you may notice various audio problems, and in your case, freezing).
Fable apparently has quite a few performance issues when running on an XBOX 360, so sadly there is nothing you can do on your part to fix this.
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