Here's what you do
Go to control panel and if you are in XP switch to classic view.
Then, double click "add/remove programs" and you should see a list of programs. Find shareaza and then click "add/remove" and it will ask you if you want to uninstall it. At this point you will click "yes"...
Go whine about how much valve sucks and how they betrayed you and how ATI and/or nvidia hired hackers and how vivendi is part of a conspiracy with id or some other bullshit that is posted on this forum everyday.