Hi Gary - As others have told you, there are several ways to reset the HOSTS
file to its default condition. You may find some additional information of
use.
First, you should understand that the original purpose of the HOSTS file
(BTW, it should always be named this way - all caps, no extension) was to
provide a local (therefore fast) translation from URLs to IP addresses for
frequently visited sites (typically your Favorites). It can still be used
this way (I do so, for example - there are utilities available such as CIP,
http://dl.winsite.com/bin/downl?500000007704 which will convert your
Favorites to IP's which you can then saveas and then copy into your HOSTS
file), but has also come to be used to block ad/malware servers by
redirecting them to your local machine instead of their servers using this
same mechanism. See here for some good info about this use:
http://www.mvps.org/winhelp2002/hosts.htm This site also has downloads for
some utility programs which you will find useful if you decide to use a
HOSTS file such as RenHosts.bat,
http://www.mvps.org/winhelp2002/RenHosts.bat, and lockhosts.bat and
unlockhosts.bat,
http://www.mvps.org/winhelp2002/lockhost.bat, and
http://www.mvps.org/winhelp2002/unlockhost.bat. The lock and unlock files
can be used to protect the HOSTS file in between UPDATES so that it doesn't
get hijacked by malware, while the rename hosts program will allow you to
easily enable or disable the HOSTS file (while keeping the correct naming
convention). As to size/performance - with any relatively modern computer
the delay added by the HOSTS lookup overhead should be negligable for even
moderately large HOSTS files (typically 250KB to 500KB) used for ad/malware
blocking. If you use it also for DNS-to-IP caching as I refered to above,
the time saved over going out to the net for DNS lookups will offset this
many times. If fact you may notice some speedup in "normal" address
browsing.
