PUP = possibly unwanted programs.
It's been discussed a lot but if you don't want those you use the DIRECT DOWNLOAD LINK.
About OPEN OFFICE. Skip that and get the newer LIBRE OFFICE.
I have downloaded a number of programs from C/Net and never had a problem both downloading or scanning with AVG free, or using for that matter.
I was looking for a different word processor so I tried to download Office Suite X AVG would not let me, I the tried Open Office again AVG would not let me, but it did allow Oxygen Office & Libo 3.6.0 it just went from one warning menu to another.
I have never found unclean programs on C/Net so can any body say what is happening.