avast is not "unticking" anything, that is for the user to do.
Foxit Reader came with OpenCandy which installed the browser-hijacking malware Conduit.
Complaints and reaction from Foxit on their own webboard:
http://tinyurl.com/qhnbo7gOne of the moderators (who seems to work for Foxit):
We sincerely apologize for this inconvenience. I'll forward your feedback and experience to our market development team for references and evaluating. PUP means Potentially Unwanted Products.
Let's see.
OpenCandy is not just a pup. It is advertising software and therefore (in my opinion) malware.
It installs (or installed) Conduit which is a browser hijacker which is definably malware.
They claim that they have removed all "crapware" in version 6.2.1
If that is true, I don't know.
I am not using it.
Personally I use Nitro PDF.
Small, works as I want, free, nothing comes bundled with it.