This post isn't 100% thought through it's meant as quick information since the possible-scam-site is the 2nd search result in google right beneath the original HM-forums.
While setting up my Holdem Manager HUD for PokerStars, I was doing a google search for:
seating preferences holdem manager
I middle-clicked(to open in a new tab) on the second search result which is called
"Setting your seating preferences in Holdem Manager"
It is a website on the domain simoncaley.com
Then a pop-up opens which asks if I want to install some-antivirus-proggy-2009 which I canceled and the cancelling of this pop-up opened the site:
pc-security-scan.com
One middle-click on this Simon-Caley site resulted in 6 entries in my browsing history.
I reproduced this here: