Bobby,
I've had this experience with Firefox and ad blocking, when I set my
filters too
wide. Yahoo and other websites seem to be pushing their ads thru the same
servers that hold their logos and other small graphics, very likely to
discourage us from blocking their ads (DOHH).
Are you using any browser or proxy based ad blocking?
I note that "Alltheweb" is listed as a questionable website by HPGuru, one
of
the sources that provides host-based filtering that I use. If you
traditionally
surf to that website, it is vaguely possible that you picked up some
software
that you may not want, i.e., spyware.
Start by downloading each of the following additional free tools:
AdAware <
http://www.lavasoftusa.com/>
CWShredder <
http://www.majorgeeks.com/download4086.html>
HijackThis <
http://www.majorgeeks.com/download.php?det=3155>
LSP-Fix <
http://www.cexx.org/lspfix.htm>
WinsockXPFix <
http://www.spychecker.com/program/winsockxpfix.html>
Spybot S&D <
http://www.safer-networking.org/index.php?page=download>
Create a separate folder for HijackThis, such as C:\HijackThis - copy the
downloaded file there. AdAware, CWShredder, and Spybot S&D have install
routines - run them. The other downloaded programs can be copied into,
and run
from, any convenient folder.
Next, close all Internet Explorer and Outlook windows, and run CWShredder.
Have
it fix all problems found.
Next, run AdAware. First update it, configure for full scan
(<
http://forums.spywareinfo.com/index.php?showtopic=11150>), then scan.
When
scanning finishes, remove all Critical Objects found.
Next, run Spybot S&D. First update it, then run a scan. Trust Spybot,
and
delete everything ("Fix Problems") that is displayed in Red.
Then, run HijackThis ("Scan"). Do NOT make any changes immediately. Save
the
HJT Log.
<
http://forums.spywareinfo.com/index.php?showtopic=227>
Finally, have your HJT log interpreted by experts at one or more of the
following security forums (and please post a link to your forum posts,
here):
Aumha: <
http://forum.aumha.org/index.php>
Net-Integration: <
http://forums.net-integration.net/>
Spyware Info: <
http://forums.spywareinfo.com/>
Spyware Warrior: <
http://spywarewarrior.com/index.php>
Tom Coyote: <
http://forums.tomcoyote.org/>
If removal of any spyware affects your ability to access the internet
(some
spyware builds itself into the network software, and its removal may
damage your
network), run LSP-Fix and / or WinsockXPFIx.
Finally, improve your chances for the future.
Harden your browser. There are various websites which will check for
vulnerabilities, here are three which I use.
http://www.jasons-toolbox.com/BrowserSecurity/
http://bcheck.scanit.be/bcheck/
https://testzone.secunia.com/browser_checker/
Consider using an alternative browser, like Firefox, for the majority of
your
browsing activities.
<
http://www.spreadfirefox.com/?q=affiliates&id=4507&t=61>
Block Internet Explorer ActiveX scripting from dangerous websites
(Restricted
Zone).
<
https://netfiles.uiuc.edu/ehowes/www/main.htm> (IE-SpyAd)
Block known dangerous scripts from installing.
<
http://www.javacoolsoftware.com/spywareblaster.html>
Block known spyware from installing.
<
http://www.javacoolsoftware.com/spywareguard.html>
Make sure that the spyware detection / protection products that you use
are
reliable:
http://www.spywarewarrior.com/rogue_anti-spyware.htm
Harden your operating system. Check at least monthly for security
updates.
http://windowsupdate.microsoft.com/
Block possibly dangerous websites with a Hosts file. Three Hosts file
sources I
use:
http://www.accs-net.com/hosts/get_hosts.html
http://www.mvps.org/winhelp2002/hosts.htm
(The third is included, and updated, with Spybot (see above)).
Maintain your Hosts file (merge / eliminate duplicate entries) with:
eDexter <
http://www.accs-net.com/hosts/get_hosts.html>
Hostess <
http://accs-net.com/hostess/>
Secure your operating system, and applications. Don't use, or leave
activated,
any accounts with names or passwords with trivial (guessable) values.
Don't use
an account with administrative authority, except when you're intentionally
doing
administrative tasks.
Use common sense. Yours. Don't install software based upon advice from
unknown
sources. Don't install free software, without researching it carefully.
Don't
open email unless you know who it's from, and how and why it was sent.
Educate yourself. Know what the risks are. Stay informed. Read Usenet,
and
various web pages that discuss security problems. Check the logs from the
security products that you use regularly, look for things that don't
belong, and
take action when necessary.
How did I get infected in the first place?
http://forums.net-integration.net/index.php?showtopic=3051
Essential tips for infection prevention
http://forums.spywareinfo.com/index.php?showtopic=24339
--
Cheers,
Chuck
Paranoia comes from experience - and is not necessarily a bad thing.
My email is AT DOT
actual address pchuck sonic net.