If you have free
virus and spyware removal a virus, you will want
to check for this extra setting after the virus is removed because it can be a way for the creators
of the virus to spy on you and determine every site you've been to and collect your usernames passwords for each of these sites.
To break into a computer that follows good security practices and successfully install a rootkit
takes skill and patience. These types of malware are especially difficult to get rid of.