Around mid-December 2014, the Google Ads policy requirements around software downloads will change. The current software principles requirements in the "Misrepresentation of self, product or service" policy will be replaced by Google's policy on Unwanted Software.
After this change, advertisers with software downloads hosted on their site or linked to from their site must comply with the Unwanted Software policy, regardless of the device on which the software is installed. All such software downloads must comply with this new policy, whether or not these downloads are promoted through Google Ads.
What you can do
If you advertise a site that hosts or links to software downloads, ensure that software downloads hosted on or linked to from your site comply with the Unwanted Software policy. This policy applies to your entire site, not just to the pages that your ads point to.
(Posted Oct 2014)