DirecTV is VERY careful about protecting the copyrights of the content they deliver. The TiVo multi-room technology doesn't meet their standards so they required that it be disabled in the DirecTV TiVos. They never have and likely never will transfer to a PC (they, like TiVo, don't even allow downloads to jail-broken iOS devices and won't allow a download to a rooted Android device).
Current Setup: 2 Roamio Pros, 5 Minis on FiOS (all with lifetime)
Moderator, DBSDish.com 1999-2000
Administrator, DBSForums.com 2000-2006