At tvfool and other sites that I visit , there is ongoing reports from users that tuners that are installed in computers are not the best for digital broadcast Tv reception.
And also Tivo has a ongoing poor reception situation.
It suspect that makers of computer installed tuners are more interested in the reception of cable Tv channels.
As often happens with this ongoing issue , users reports are that digital tuners in digital Tv's are much better with solid no problems reception.
Here are some stand alone tuners and dvr's that have Excellent Digital Broadcast Tv Reception.
And are easier to use , then computer programs and installing hardware and software in computers.
http://www.epvision.com.
http://www.channelmasterstore.com.
Here is Internet Streaming.
http://www.wdc.com/en/products/products.aspx?id=570.
http://www.roku.com.
http://www.vudu.com.