1.
System details - help us to help you (click on blue link)
2. Try downloadng a magnet link from the following link & describe to us what happens:
+ MagnetMix.com +: The Source for Good Content
Sounds to me like ISP intervention. That's usually the cause of zero search results if properly connected.
Also under LW's menu bar, Tools>Options>Searching are options. Check each one. Make sure you have at least one search option, set to all types of connections & qualities.
Under Tools>Options>Filters make sure Content is not ticked, Junk is set to about 1/3.