Try re-checking the integrity of the torrent download in uTorrent; it may have accidentally skipped some small pieces. Make sure the torrent is completely stopped (not paused, or queued, or seeding, but STOPPED), then right-click on EnderalInstall_EN.gz and select "Force Re-Check." This will force uTorrent to check the hash of your downloaded files against the hash of the original, ensuring that every piece was downloaded correctly. If it finds any issues, it will download those pieces; don't worry, it's not going to re-download all 8GB. Usually it's only a few MB worth of data that was missing.
If uTorrent starts downloading the files again after re-checking, that means some of the data was missing, and uTorrent will grab them now. After the download finishes again, try the installation once more. Hopefully this is the issue.