Java problems

[Raze]

I've been having problems keeping Limewire open for about a month now. It started when I got my new computer (my dad's old computer). Limewire will open fine, and I may even be able to use it problem free for five or ten minutes, then suddenly an "illegal operation" message will pop up and limewire closes. If I try to open it again, it will tell me that it couldn't access the java runtime environment or something.

If I reboot the computer, the same will repeat, with Limewire working for five minutes then crashing. I've read all the other java threads and have removed and re-installed java several times, I've even removed and reinstalled limewire, but this has been going on for a while. I currently have the latest version of limewire, though it was having this problem on the last one or two versions I downloaded previously. I have no firewalls, my internet works fine, and I'm running windows 98.