Just had a similar thing happen -- up to thirteen "SbClientHelper.exe" processes were running -- 64bit Win7 SP1 system running 5.2.8. Any suggestions by McAfee?
Support call was very unhelpful.
The suggestion was to tick the "Do not show me the warning for this program again" ... which doesn't address the issue.
I don't use EEPC for single signon and there's no reason sbclienthelper should be initiating during web browsing.