Something is deleting my limewire program

[Saraluna]

I've looked all over the boards for this issue, but I can't seem to find anyone with the same problem. Don't know if I'm posting in the right place, I hope so!

Limewire keeps getting removed from my pc. I can install it, no problem (basic, not the pro). But somewhere in a matter of a day or two, it gets entirely removed. I've no doubt it has to do with my spyware/AV. I'm running XoftSpy, Norton and PestPatrol. I've also got a firewall. What is that I should be doing to prevent this from happening over and over? I've probably re-installed LW at least 20 times in the past few weeks, so you can understand that it's getting frustrating. I know it's not LW - I just don't know what it is or how to fix it. Anyone??? Thanks!