Many third party utilities you use will bundle things like McAfee Security Scan, Java, etc – this is an example of a computer I was on simply trying to install Adobe Reader.  By DEFAULT – it’s going to give me McAfee Security Scan as well.  Look how easy it is to miss it…….

McAfee Security Scan and Adobe Reader

 

And here’s one where the ASK Toolbar was trying to be bundled with Java from Oracle……

Ask Toolbar