I have a KWorld PVR-TV 300u USB TV Tuner and it works fine with Windows XP. So, I upgrade to Windows Vista and realize that it is not compatible. Later, I look on KWorld's website and see that they have released a driver for it that works with Windows Vista. I install it and it says that the installation was successful. I then try and open Windows Media Center to try and set up my TV Tuner and it says that there are no TV Tuners connected to the tuner. Soon later, I try to install the drivers again and it now says that the driver installation failed. Can anyone help me with my problem?