Unable to set up Chromecast with Windows Vista on my PC?

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http://forums.androidcentral.com – Note: I just ordered my Chromecast from Google Play Store. I have two PC’s on my wi-fi network, one with Windows 7 (which theoretically CAN be used to set up Chromecast, and one with Windows Vista (which theoretically CANNOT be used to set up Chromecast). Unfortunately, the PC with Windows 7 is in a different room than the TV set, and I guess I would have to be running back and forth during setup to complete the setup process. Assuming this is possible, and the setup is successful, can I thereafter use my Windows Vista PC to cast to the TV, assuming that I also download the same setup a (HowTos)