Comcast High-Speed Internet Service does indeed support Windows Vista, so while some of their free or discounted third-party offers may not work with Vista, their service package itself does. (And note that you shouldn't need to install any modem software/driver package they give you either.)
Hope this helps,
John
Hello i can't get dsl in my area,but i can get comcast high speed.
My operating system is vista home premium 32bit.When i went to comcast the supported windows system went up to win.xp.Vista was not listed.I feel more confident asking here than comcast!I had comcast cable and changed to direct tv.I know that comcast is offering what they call double and triple play.The double play is high speed internet and phone service.Thanks for any advice.
Edward

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