i am having this exact same problem. it started yesterday. i had LW running overnight in the mornihg it had stopped with an error. i restarted and it worked fine untill i noticed that my computer was running slow. it was LW using 100% of my cpu. i have already tried reinstall an looking for viruses an spyware and every thing else that has been suggested. ive noticed that it slowly starts using more and more cpu, and that if i shutdown all searches in LW it gets better and then starts using more and more cpu again untill after several hours it will error and ill have to cntr alt delete and shut it down. i only inatalled LW two weeks ago. it ran peachy untill yesterday.

Here's another thread about using too much CPU
http://www.gnutellaforums.com/showth...ght=100%25+CPU

If you use the forum search to look for 100% CPU, 99%CPU, too much CPU etc etc... you'll probably find a heap of old threads & maybe some other things to try

the info on those threads didnt help. i did just change to to an older version to increase my download speeds as was suggested to me for that and it seems to have rid me of this issue. i changed to version 4.9.37. but thanks for trying to help by suggesting that i didnt try searching for my problem first.