Disabling DHT & TLS might mean that LW uses a bit less of your computer's resources. You can disable them if you like! This thread (from another forum) suggests that TLS might not even be in use anyway.
LimeWire Forums

I really think you should go to a site that can offer you specialised malware help

I'm having exactly the same problems... keeps restarting on it's own, and also is loading the < ' > folder with thousands of program bits. will try those solutions when I get home... Please post if you get the problem solved, and by which method.