The thing is, Lime Wire will not slow down your laptop, but you can get a virus. It is avoidable by let's say, I search up 'break' and then I should see which songs have been used the most, and those are the ones at the top. Now if you do get a virus, you can just search up house call and download the anti virus, and it will get rid of the virus.
Edit:
I recently found out Lime Wire was sued, and is now illegal. You can use BeeMP3, and the same things apply to BeeMP3.