I HAD PURCHASED ENTER USB TV TUNER AND INSTALLED IN WINDOWS 7. THE CHANNEL CHANGES VERY VERY LATE. IT TAKES A LONG TO RESPONT TO REMOTE.
Turn off your caps lock, you are shouting. Is that tuner card ssupposed to be compatible with Windows 7?
I have no clue because you gave not specs at all, othr than Windows 7, and you didn't state what version.