Having read various threads in this forum I decided this was the way for me to be able to watch Freeview on my computer (a Mesh AMD 64 3200+)
I installed in without too much trouble and can see it listed in the device manager as "USBDTT - USB DVB-T adaptor" and is "working properly". I have a co-ax cable linking it to my TV aerial socket. I have a 12' mast on the roof plus an signal amplifier which used to give good TV reception before I switched to cable TV.
I go through the DTT SETUP process where the box scans for channels. It seems to pause at various transponders and says "analysing". But when it gets to the end there are no channels in the list.