Q: KWorld 399U USB TV tuner "unable to determine TV signal configuration" Windows 7 Media Center (64 bit)

I have just upgraded my 64 bit Vista machine to Windows 7 and am no longer able to use my KWorld 399U USB tv tuner in Media Center.

It worked fine under Vista, however after upgrading I was asked to set up my tv signals again. After Media Center runs "examining TV signals" for several minutes, it displays the message "Windows Media Center is unable to determine your TV signal configuration".

I have tried downloading and installing the latest Windows 7 drivers from, but this does not make a difference.

I rolled my machine back to Windows Vista and the tuner works perfectly again, even after installing the latest drivers.

Can anyone help?

Many thanks for your time.



I had exactly this issue. My setup worked for weeks, then afer a ram upgrade MC could no longer get a signal from the usb U399. After much ado, I uninstalled the driver from device manager, rebooted and windows prompted me to install an MSI driver... I tried this, and it only worked!!

Looks like the KWorld installer seems flawed.

The driver Windows located is

 Good luck.

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Views: 3,478 Last updated: March 13, 2018 Applies to: