Gnutella Forums - High CPU load-Problem

Hy guys, i really have a serious problem with my limewire and i don't know why. a couple of weeks ago i started up limewire as usually, but i reckognized that the cpu load was higher than normal over 35% . I thought it would be a java problem so i reinstalled my java version but the problem remained. Limewire works just normal but it takes hours to access the harddrive in this time, it takes him half a minute to preview a incomlete mp3 file. all other java apps on my system runs normally. I also tryed frostwire and a new limwire version, but with the same problem. Does anyone what this, how its cuased and what one can do against it?