Two Partitions Belong to Home Network?

Partition 1: Win7 on Home network: WMC broke & could not re-install/sfc/repair fix. Wanted setup a 2nd prtn/wmc/S'dust HDHR3 tuner h'ware without losing my recorded TV which will still play, but not from a 2nd prtn (copy protection).

2nd prtn Win7 is not discovering the HR3 device, & seems confused about being on the same Home network with another Win7 PC.

Is there an conceptual contradiction here with 2 prtns trying to belong to Home?

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