I am using Windows Vista operating system with Kaspersky antivirus. The antivirus has alerted me about the entry of Backdoor.Bot.90605 in my system, but it is not able to find it on scanning. So, I do not know how to delete Backdoor.Bot.90605 from the system. Isnt Kaspersky a good antivirus? If not, please suggest me some good antivirus, that can protect my system from all kinds of infections.