Don't know how Bearshare is these days, but it's been my experience (along with many others) that Bearshare clutters your system with ads and popups and files that could potentially harm your system.
I use Ad-Aware and SpyBot to rid my system of unwanted files and when I had Bearshare, I couldn't understand why I kept on getting unwanted files all over again. After I got rid of Bearshare, it was back to normal.
Hybrid Mode
