My Sony SVR-2000 failed on attempting to load an update. Reading on this forum lead me to believe that it was a hard drive problem. However, on the advice of a Tivo tech, I corrected it as follows: (1) System Reset --- Reset Thumb Ratings and Suggestions (2) System Reset --- Clear Program Data & To Do List I first initiated #1. When that completed and the problem wasn't solved, I initiated #2 which took five hours to complete despite the message that it would take one. That took care of the problem. The tech's instructions were that it was a "cache" problem and that I should try the above fixes sequentially and then try "Clear and delete everything" for my third attempt if the previous two didn't work. That proved unnecessary. Note that it takes forever for the Tivo to perform these tasks and it is unresponsive while the 2nd is ongoing. (Don't know about the first since I started it and then left it unmonitored.) Don't get discouraged. Hope this helps someone avoid purchasing a new hard-drive unnecessarily.