Valiselight.exe (downloader) help

Hi all, I had a program on my hdd called "Valiselight.exe" Norton removed the infected file and when I do a scan it dosnt show up anymore until I was away from my pc a while and Norton told me it found it again through auto-protect (a timeout protection?). It is "Blocked" in security history but should I be worried about this problem, is there a way to get rid of it for good?

 

Thanks

Gabriel-Knight