its a rogue anti-spy asking u to download its nastier side; posbly a Virusburst variant. turn off system restore for the moment. use rogue remover. and then finish off with ccleaner. btw, adaware is also xpctd to remove it. scan in safe mode for best results.
see this for more *www.thinkdigit.com/forum/showthread.php?t=11292&highlight=rogue