Gave my 2-year old Tivo Premier to my Mother. She uses it for hours, every day, recording her favorite news and cooking shows. Lately, over the past few months, there have been times when navigation has become more than just sluggish -- it comes to a complete crawl. Enter a remote command and the screen just hangs for seconds before executing it. Each time I have had to unplug the Tivo and reboot it, where the navigation speed returns to normal. ....but what is causing this sluggishness? The hard drive is not full. Recording capacity is under 20% despite the fact she records everything under the sun. I can tell you that, as an old retired lady, she sits in front of that Tivo unit for 7-8 hours a day. That Tivo gets a lot of use. Appreciate any suggestions as to what the problem can be and if others are experiencing it too.