Advertisements Use the security (or parental controls) of your router to block this string: TMS_US/static/SwSystem Unblock when you are ready to update, and do two manual connections to check for the update. I tested this string, and the Roamio I used it on lost no functionality, except the ability to download any new guide data, before the block was removed. It would abort the service connections, after authenticating, verifying the account status, and setting the time, when the first file of the update download would occur. After 12 days, a warning popped up that the guide data had run out (but really had two days worth left). No ill-effects from this experiment in "I'll update when I want to". ETA: This will not help if your TiVo has already downloaded the update, which can be checked by looking for the "pending restart" under settings->network.