Hi, it is indeed LiMewire's fault. I also have the same problem. I use Windows NT 4.0 and right after installing Limewire V2.0.2, Mcafee Visruscan, in particular Vshield stopped working. When the computer starts I get an error on AVSync Manager service, and Vshield no longer loads, the rest of the package works.
I know it is Limewire fault because I made several tests and all the times, Mcafee visrusscan crashed right after installing Limewire. The most annoying part of the problem is that if I try to reinstall Virusscan, the installation crashes with MSIEXEC.EXE, that MS program is modified by Limewire.
The only solution I have found so far is a clean installation of Windows NT and all software and not to use Limewire... I still use Limewire and Norton Antivirus.