On my laptop, which is running XP Home Edition (SP2), I have AVG Anti-Spyware installed, along with WinPatrol Plus; Comodo Firewall; Dr. Web Anti-virus; and Sandboxie. I use, most of the time, Firefox. I was wondering if Comodo BOClean (free version) would add anything useful to the overall security, or whether it would be redundant or unnecessary. I don't know enough about how these various programs overlap. Thanks in advance for any help!