It seems not so easy to block as to remove. This makes a good job of removal: http://www.bleepingcomputer.com/download/junkware-removal-tool/
This junkware is not blacklisted and therefore not detected and/or blocked. How these guys are being tolerated, they must be clever…
They pretend to address the issue here http://www.conduit.com/Community/Forum/Questions.aspx?fpage=10&threadid=8423

But it is clear that the attempt is disingenuous.http://forums.cnet.com/7723-6122_102-504164.html link info from Douglas McArther

Here is a way to block it:
https://github.com/mozilla/amo-validator/blob/master/validator/testcases/conduit.py
if there are traces of search.conduit.com there?
If search.conduit.com pages are opening up each time you start up Chrome, check in Wrench > Settings > On Startup > next to the radio button for Open a specific page or set of pages, click on Set pages > remove any unwanted URLs by hovering over the URL until you see an “X” appear to the right side of the URL.
If all searches that you perform in the omnibox is returning with results from search.conduit.com instead of your preferred search engine, check in Wrench > Settings > Search > Manage search engines > check the list of Default search engines, Other search engines, and Search engines added by extensions, and remove suspicious entries that you are not familiar with. Depending on your extensions, you may not see the last section for Search engines added by extensions.
If search.conduit.com is opening up when you click on the Home button, check in Wrench > Settings > Appearance > select the Show Home button checkbox > check if the URL that appears below it references search.conduit.com. Uninstalling Chrome and then reinstalling it without the Conduit folder may solve the problem of the broken “Manage Search Engines”.

polonus