for the last 2-3 weeks between 4-6am every day Tivo box goes into a reboot cycle, Is it looking for an update?
This is normal for the box to update when it's not being used, however every day does seem a little excessive.
Is it still doing this now? Have you noticed any other issues with the box when it's on, running slow or error messages?
If so then please pop me a personal message so I can take a closer look!