Peter,
I think you may find that it's an promo. If you right click it and review the properties you'll see it's a cleverly disquised anti virus promotion.
Don't use 2 different anti virus programs together, one will screw up the other and in turn, possibly foul up your windows Xp.
I use ad-aware, I've never had any problems, but I only use it as a spy scan. I use Norton anti-virus for protection. I've disabled MicroSoft anti-virus.
You might want to invest in a router if you don't already have one.
Good Luck and because we've never conversed before...."Welcome aboard the Zone"
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...shboom
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...shboom