Trying to remove NationZoom

Heey : ))) Can anyone tell me where i got this nationzoom thing from? It just showed up and now i'm trying to remove it. I did as those people wrote and I think I managed to bring my old homepage back for now (I'll see after I reboot my PC if it still stays there), but now I have to download some antimalware tool. Is someone using this spyhunter program? Is it a good one? Should I download it? Thank you guys :))