If you can see it in the task bar then you can probably see it in the XP task bar and at the very least it would be in task manager so it can be killed in XP as well, therefore this is not a reason to stay with Win 7 or to ever migrate to it if you haven't already.
You might also try blocking the ads via your hosts file.
http://www.mvps.org/winhelp2002/hosts.htm
They update the list every other month or so and you add them to your hosts file and it gets rid of the most annoying ads. It's funny; I go to some sites where the people complain in the comments about the annoying ads and I have no idea what they are talking about. I love it on hula.com when it tells me it cannot display the ad and I should fix my ad blocking software - LOL, I would rather read that message for 30 seconds than hear an actual commercial.
Of course some sites won't give you what you want unless you do allow their commercial crapola, so you keep an empty host file in backup and you rename them back and forth (or create a batch file to do it). But usually I don't want it bad enough and I just go on to some other site.
Come on people! Convince me! Why shouldn't I just go back to XP? Why should anyone upgrade to 7 if they have XP working?
I heard all these horror stories about Vista, do not go to Vista, well from what I can see of Windows 7 it looks/works/acts like vista or worse! Atleast Vista allowed you to use some of the old style. The only thing I saw wrong with Vista vs 7 is Vista warns you you will have to give administrator power before it actually shows you a box to give it where 7 cut this down to just the one box - I suspect turning off UAC in Vista would have cured that as well.
NOTE: I played with Vista all of about 2 days before reverting to my XP HD and then after a few days w/o sound I upgraded that HD to 7. The old HD that I took out with Vista on it (my first noisey Hitachi for anyone familiar with the Noisey HD thread) went into a computer I refurbed for my niece and that too I upgraded to 7. This third case that I bought to resell came with Vista but I upgraded it to 7. So I have access to 3 computers with 7 ... no actually 4, the laptop I bought my nephew for Christmas is also 7. And for my niece and nephew 7 is fine - they aren't heavy users and the don't have old hardware I couldn't get going (I had to tweak my nieces to use her old printer but HP previded the workaround on their site).
But for me it comes down to one piece of hardware that I absolutely love and have had for 15 years ... my Trackball. It fits my hand perfectly and my hand doesn't cramp up like it does with some mice. I bought the new version from Amazon - it arrived today and I just hate it. I'm supposed to use two fingers to do right, center + scroll, and left buttons insted of three fingers which seems so much more natural. I tore it apart to see if I could move the guts of it into my old one so it would feel old but work new - not gonna be possible, very differnt inside. So now I need to return it.
I figured out what I need - I need an Ubergeek - someone I can feed Red Bull & Doritos and they pop out a 64bit mouse driver for a logitech trackman marble wheel in about 20 minutes !!! Hey Fire cat, what are you doing after math class?!? LOL