Freezeing Thomson DTI6300 ?

I have a Thomson DTI6300 DVB-T Twin Tuner 160GB that freezes. I have been told to unplug the machine from the mains and reconnect, which sloves the problem for about 10 mins and then freezes once again. I have canselled subscription to TopUpTv because of this, reset to factory settings and rescanned the channels. Any other ideas?