I want to edit the hosts file to block sites that are regarded as undesirable or to block ads.After assigning the loopback IP 127.0.0.1 to an URL that I want to block.
If I go to Firewall\Blocked Zone\Advanced and check Lock Hosts file.Will this prevent from been hijack from malware.





Firefox/3.0.5
XP SP3
ZoneAlarm Security Suite version:7.0.483.000
TrueVector version:7.0.483.000
Driver version:7.0.483.000
Anti-virus engine version:3
Anti-virus SDK version:5.0.1.85
Anti-virus signature DAT file version:966439226
Anti-spyware engine version:5.0.189.0
Anti-spyware signature DAT file version:01.200812.5075
AntiSpam version:5.0.6.8903