1. If you are using LimeWire, I would recommend this Security packages for LimeWire (help block out the spam and evil hosts)
Unfortunately the block lists do not work with LW clones or with Ares. To include the word filter that comes with the Security list, first delete your LW preferences folder before using the Security installer. http://www.gnutellaforums.com/genera...ows-7-8-a.html or step 2 here http://www.gnutellaforums.com/window...ng-should.html for Win XP or earlier.

2. Not sure what you mean by an ad, if you mean on the main window & not in search results then I don't know. But if it's in search results, try adding the word ares to your Word filter. Ares as a word filter might conflict with other things you search for however.