Greetings --
I'd have to guess as to why you see a noticeable security
difference between the installations made using the Dell CD and the
installation made using the other one obtained via eBay, but I'm
reasonably sure (iow, I heard it from a reliable source but haven't
personally tested it) that Dell OEM installations are set to have
WinXP's built-in firewall enabled by default, while most other OEM CDs
and the retail CDs don't.
There are at least three varieties of pop-ups, and the solutions
vary accordingly. Which specific type(s) is troubling you?
1) Does the title bar of these pop-ups read "Messenger Service?"
This type of spam has become quite common over the past year or
so, and unintentionally serves as a valid security "alert." It
demonstrates that you haven't been taking sufficient precautions while
connected to the Internet. Your data probably hasn't been compromised
by these specific advertisements, but if you're open to this exploit,
you most definitely open to other threats, such as the Blaster Worm
that still haunts the Internet. Install and use a decent, properly
configured firewall. (Merely disabling the messenger service, as some
people recommend, only hides the symptom, and does little or nothing
to truly secure your machine.) And ignoring or just "putting up with"
the security gap represented by these messages is particularly
foolish.
Messenger Service of Windows
http://support.microsoft.com/default.aspx?scid=KB;en-us;168893
Messenger Service Window That Contains an Internet Advertisement
Appears
http://support.microsoft.com/?id=330904
Stopping Advertisements with Messenger Service Titles
http://www.microsoft.com/windowsxp/pro/using/howto/communicate/stopspam.asp
Blocking Ads, Parasites, and Hijackers with a Hosts File
http://www.mvps.org/winhelp2002/hosts.htm
Whichever firewall you decide upon, be sure to ensure UDP ports
135, 137, and 138 and TCP ports 135, 139, and 445 are _all_ blocked.
You may also disable Inbound NetBIOS (NetBIOS over TCP/IP). You'll
have to follow the instructions from firewall's manufacturer for the
specific steps.
You can test your firewall at:
Symantec Security Check
http://security.symantec.com/ssc/vr_main.asp?langid=ie&venid=sym&plfid=23&pkj=GPVHGBYNCJEIMXQKCDT
Security Scan - Sygate Online Services
http://www.sygatetech.com/
Oh, and be especially wary of people who advise you to do nothing
more than disable the messenger service. Disabling the messenger
service, by itself, is a "head in the sand" approach to computer
security. The real problem is _not_ the messenger service pop-ups;
they're actually providing a useful, if annoying, service by acting as
a security alert. The true problem is the unsecured computer, and
you've been advised to merely turn off the warnings. How is this
helpful?
2) For regular Internet pop-ups, you might try the free 12Ghosts
Popup-killer from
http://12ghosts.com/ghosts/popup.htm, Pop-Up Stopper
from
http://www.panicware.com/, or the Google Toolbar from
http://toolbar.google.com/, which is what I use.
3) To deal with pop-ups caused by any sort of "adware" and/or
"spyware,"such as Gator, Comet Cursors, Xupiter, Bonzai Buddy, or
KaZaA, and their remnants, that you've deliberately (but without
understanding the consequences) installed, two products that are
quite effective (at finding and removing this type of scumware) are
Ad-Aware from
www.lavasoft.de and SpyBot Search & Destroy from
www.safer-networking.org/. Both have free versions. It's even
possible to use SpyBot Search & Destroy to "immunize" your system
against most future intrusions. I use both and generally perform
manual scans every week or so to clean out cookies, etc.
Bruce Chambers
--
Help us help you:
You can have peace. Or you can have freedom. Don't ever count on
having both at once. -- RAH
