Make sure the antivirus is update to date and maintained to ensure that your computer can defend itself from viruses that try to access your emails, files and servers.
For example, a rootkit can modify system
logs so as that all references to its insertion, to log-ins by the intruder and to the Download Free Spyware running of programs by the rootkit are either not recorded
or are deleted. Some malicious software monitors the
sign on screens of some of your more frequently-accessed websites and can replicate those with a view to
capturing your ID and password.