Stars v padlock?

[TinkyWinky]

Hello, this is my first attempt at using Limewire so forgive me for what is probably a really stupid question. In the quality column, there are stars indicating the quality of the download, and I have read on the forum people talking about this. However, on the top of the search column I read "Only search results with a (padlock sign) are official limewire communications" and when I click to find out more, it says there should be a padlock sign in the quality column, and that if there are only stars in the quality column then this is an example of a virus. Putting aside the fact that whenever I performed a search, there are no padlock signs to be seen, I have read amongst the forum chats people talking about the stars so am i going mad or what? thanks for any help. I only wanted to download some music for my son's birthday party, but I knew it wouldn't be straightforward