Okay, so I've googled this one to no avail. I've got two machines - one this works fine on, the other it doesn't. Both Vista Ultimate 32-bit. And I have it working in a Virtual PC (XP Pro) on the same machine that it won't work on natively. I get an error when it tries to start Tivo Desktop or Tivo Server, saying "The Parameter is Incorrect". Weird, huh? I've uninstalled, cleaned the registry of anything with the word Tivo, zapped the User/Tivo directory, etc. Any ideas on this one? I've never seen it before, and I have no idea how to fix it.