Is "McAfee security scan plus" safe?

A few days ago, a "Mcafee security scan plus" was installed on my computer. I dunno where it came from, I think it installed itself, or was installed when McAfees updated. I'm not sure if its real, or a virus, cuz last time I got a virus, it was a windows security fake called... "Windows Security... show more A few days ago, a "Mcafee security scan plus" was installed on my computer. I dunno where it came from, I think it installed itself, or was installed when McAfees updated. I'm not sure if its real, or a virus, cuz last time I got a virus, it was a windows security fake called... "Windows Security 2010" (or something like that) and it messed with my PC big time.

So, is this "Mcafee security scan plus" safe? Its saying now that it wasts me to install Web Protection. It brings me to this website when I press "More information":
http://us.mcafee.com/root/landingpages/affLandPage.asp?affid=739&lpname=Adobe_pro&aco=0&pfid=3&cid=70303&ss=2&rid=10&ths=&trj=&vir=&pup=&virc=&trjc=&pupc=&webd=&web=

Though, it doesn't say my computer is unprotected. It says I am, but that web protection is not installed...

I DID NOT DOWLOAD THIS, I DUNNO HOW IT GOT THERE, BUT IT MIGHT HAVE IN AN UPDATE

Don't you have to pay for a plus product?
Update: I know the reg. McAfees is safe, but is this "plus" vesion that just showed up safe?
Update 2: Just as a little extra, heres a screenshot of the program it installed:

http://i722.photobucket.com/albums/ww221/Nejijiji99/test.jpg
11 answers 11