- Tried helping a fellow ham today install his dvdongle on new win7 highend laptop. laptop made to operate SDR radios. Anyway got the drivers per the instructions and installed. got pulsing blue light and all. downloaded twice the dvtool 2.0 beta 4 and it stil cannot see the dvdongle. checked setting and used the unblock trick and checked com port settings. found nothing obivious wrong. any ideas??