Advertisements TIVo has replaced our unit twice because of freezing. We've only had TIVo a few months. Last night we turned it on and once again found it was frozen and that it had not recorded the 4400. This is our third unit. I cannot believe we keep getting bad units. It has to be something else. Our TIVo is networked along with our computers to our wifi cable network. I wonder if perhaps the wireless "dohickey" they sold us could be to blame?