Please post they brand and version of you av software and the exact message you are getting. Some infections look like an av warning but are not what they seem.
hi actually my system showing massage is Unwanted program or virus found in your system in c drive /window/system32/ etc/host and asking for action...
and in detail hosts object is detected by TR/Agent VB.1896 ACTION IS MOVE to quarantine
and my anti virus is avira antivir personal_free anti virus (EN),707