Lot has a TIVO Series 3 and he did a a required update, but now it won't work when rescanning. So he's in a constant reboot loop. Leo says he can try going back to factory settings, but if that doesn't work, then the update is incompatible with that TIVO and it's more or less bricked his device. Leo would advise contacting TIVO and demanding they fix it or replace it.
If he wants to move on, then Leo advises Channel Master. They make an over the air DVR that would also work with streaming. Silicon Dust makes the HDHomeRun, but Leo says that works with his computer.