I'm pretty sure we are not looking thoroughly into your computer's and your friends computer's updates, service packs, software patches, security account policies or restrictions with your account, software configuration issues (at the OS level and application level), to include migration path issues as we browse, chat, stream or email, and what not (and God knows what else people do). Nowadays people call it bloatware, specially on hand held devices, and it is almost like witnessing a shark feeding frenzy out there with all the advertising campaigns for cool apps, free software, games, etc.