Jenny, the padlock sybmbol has nothing to do with any files apart from LW updates
If you're not connected properly, that can effect how many search results you see. Can you give us your details, as WW asked earlier?

For now, here are some things that might help with your search results.

1. In LW go tools > options > searching > basic & check whether the 'show license warning' box is ticked. If it does, untick it > Apply > ok...see if that makes any difference.

2. Problems with the search

3. Delete LW's preferences folder when LW's properly closed. See point 3 here & also point 2 if you've used older versions of LW in the past (there could be a folder in either location).
Fixes for LimeWire
This will kill all of your settings within options, you'll have to go back through afterwards & reset things.