from its own homesite (not a bad idea) http://www.malwarebytes.org/mbam.php
Just two days ago, my Google in Firefox and Internet Explorer suddenly started redirecting me to "the mall," if you will. No matter what I was looking for, I was taken to shopping sites, some of which related to what I wanted, and some which related in a strange way, ie: putting "basic usb optical mouse drivers" in the search field would take me to a pest control advertisement, among other things.
I noticed some extra verbiage in the lower left, where I usually see something like "connecting with google," or "waiting for softpedia," etc. The extra verbiage was "analitic-check.google.com" (without quotes).
By downloading Google's Chrome, I was able to get some information, that sounds pretty bad: analitic-check is a nasty virus that was getting past every anti-virus program, every anti-spyware program and adware program, and didn't show up on Hijack This logs.
To keep a long story shorter, I learned of a program called "Malwarebytes anti-malware." It can be downloaded from http://www.download.com/Malwarebytes-Anti-Malware/3000-8022_4-10804572
If the analitic-check has gotten you badly enough, it will prevent you from getting to sites and/or programs likely to help you. You can, however, get to the above download sites by copying and pasting the URLs -- or by installing Google's Chrome. In Chrome, Google continued to behave as usual, even before I realized I had a virus, and even before I got rid of it.
From others on the net, I kept hearing that the Malwarebytes program is the only one that could get rid of analitic-check. Just hoping I can help someone.