Limewire is fine , but like a browser it depends what you download with it. If you take care you should have few problems. Look at the stickies abve the forum messages and look for those about viruses to learn more. Run an up to date virus programme and so on and If you are downloading something that should be 100 megabites don't think that if it is under 1 megabite that it is what you are looking for
