I use PC Guard as part of my Virgin Media broadband package. After a recent scan, Dialer HC was reported, quarantined and removed. After the next scan it was there again and re-appears after every scan. I have also scanned with AdAware, Kaspersky online, and Xsoft. These report no infections every time, but PCGuard still reports Dialer HC in the registry at hkey_current_user\software\microsoft\windows\currentversion\internetsettings\zonemap\domains\sgrunt.biz.