Norton Internet Security 2009 Scanning Help

When I do a scan, full or quick, the scanner shows "Checking For: Hacktool.Unreal.A" and not only that it also shows other ones like Checking For: Trojan.Zlob etc it shows loads. I'm not sure if my computer is infected or is the NIS 2009 scanner meant to be doing that, can someone help me.

 

Internet Security/Antivirus: Norton Internet Security 2009

Operating System: Windows Vista Business Service Pack 2