I remember a few months ago I recommended to a friend a free anti virus program I found on CNET. What I forgot to mention is where he could download the antivirus software program. If your wondering what software I'm referring to is AVG.
He did a search on google using internet explorer and downloaded the anti virus software from what seemed to be a credible website with the free download. Long story short he downloaded a malware program which did a lot of nasty things to his computer.
So anytime anyone makes a recommendation for a software go to download.com. They screen the site so you don't have to worry about what your downloading onto your computer. What helps when you go to download.com is users will place their comments on how good or bad the software is when he or she has tested it on their computer.
Another tip is if you plan to look for the program yourself, use firefox. The browser has a pretty good malware, spyware detection capability that Explorer is barely implementing.