How can i delete host file ?

[Sameer0337]

My system show this->
C:\Documents and Settings\ACEM>
now what i will do ?

 

[kenrivers]

ACEM appears to be a user folder not a host file. Have you checked under users to see if there is a username ACEM?
"To open the User Accounts tool, open Control Panel from the Start menu, and then double click User Accounts."
http://support.microsoft.com/kb/279783