¡Hello again!
Well, I forgot to say one thing. In Vista computer, apart from having WebRep , I had an Avast icon in the desktop. In Vista computer I have a Sidebar, and some gadgets (clock, calendar…) I can add or delete gadgets as I want. So, I had this Rightside Icon, for Sidebar I have placed on the right. Then, on starting my Vista computer, this icon used to appear inside Sidebar. Then, I deleted it . But in XP computer I haven’t any Sidebars , neither any Avast icons have appeared.