There's a batch file on your desktop called FixLSP.BAT. Double-click on that.

Uninstall Spyware Doctor, Windows Defender, new dot net and iolo AntiVirus.
If any of these don't have their own uninstall links in the Start menus the
Add/Remove Programs tool in the Control Panel might have them.

After you do these things reboot and try BearShare again.