The product in question does exist but may not be what you are
expecting. It is not a "modification" to your computer, but a piece of
software that you install on your computer.
The software is a video viewer application that is pre-loaded with
over a thousand addresses of video content that you can access using
your (existing) broadband internet connection.
Most if not all of the content available through PCShowBuzz can
already be accessed for free using your existing web browser and media
player. If you're not familiar with how this works, try the content
accessible via Web TV List
or Break TV
For example by following links from Web TV List I reached the WBRZ-TV
website where a menu option entitled "Video" led to a list of their
content that I could view online - without needing to buy the product
that you are asking about.
"Radio and Telly" reviewed the product, and had this to say:
"PCShowBuzz is essentially a manager for the playback of streaming
video files over the Internet ... The application itself is pretty
usable ... where the whole concept begins to break down, is with the
actual TV content available. Although there are hundreds of items
listed in the pre-populated content selector, we struggled to find any
actual live streaming TV content... most of what we found consisted of
prerecorded show extracts, some quite out-of-date. The quality of the
video feeds also varied quite dramatically, and some were almost
http://www.radioandtelly.co.uk/internet.html (scroll to the bottom)
The product is also discussed here:
You ask about spyware - whilst I can't guarantee that the product
doesn't install spyware, this does not appear to be its primary
purpose. The product's own webspage states "We do not secretly install
adware or spyware" but it wouldn't hurt to check the fine print of any
click-through license agreement.