You realize that there are 3 versions of the current DivX codec. The first being the free version with less features, there are two with more features, appropriately named DivX Pro, one is free but comes with spyware/adware and the other you have to pay for and does not come with any spyware/adware. So unless you need the extra features, I haven't yet, then stick with the basic free version, I use it now and have had no troubles with adware or spyware.