Hi, I pluged my hp express card into my computer,

First verify that the TV tuner device and driver are listed in Device Manager. If you see the device there but is has a explanantion mark and says that the device is not working properly then try removing the device from the device manager and uninstall the software. Then re-boot the computer. When the computer restarts the found new hardware wizard should come up. If it may automatically install the device driver if it does not and asks for the device driver try letting it search the internet for the driver. If it does not find the driver then cancel the installation and try re-installing the downloaded software again(make sure it is the correct software for your OS and device). It should install and recognize the device. If the device manager shows a problem with the device again then try to update the driver from the devivce manager manually and see if the driver is located in the installation folder for the HP express software. Let me know if that works or what you find so I can assist you further.