Hi, I installed kazaa 3.0
Since the use of this software can introduce an endless list of troubles to
a system, it's impossible for us to tell you how to fix the problems you're
having. The root of the problem could be malware (adware, spyware, etc) or
a virus (it commonly is). Or it could just be a bad install of Kazaa that
has fubar'd other system files (not as common but possible with any
software installation).
Suggestion: Uninstall Kazaa. If still no sound or icons, try System Restore
using a date from before the problems appeared. Then visit the Kazaa
website and read up on their software, common problems and so on in their
technical support area (try their online user guide). You may even want to
shoot an email off to themexplaining the trouble their has software caused
for you. They may have fixes or workarounds to suggest.