Hi, I've done some of your 16 steps.Her's the results:
3- Flash Player is up to date
4- My update are completed via another updater but are ok
5- Page refresh didn't do any good
6- Security Levels are ok
7- Windows Live: it works perfectly with it
8- Firefox: Works perfectly with it
9- I have AVG 2015
10- Tried Spybot
11-Privacy is at default
13- DNS OK
14- same as Number 7
15- didn't change anythin
16- didn't change anything
Continuing your steps...
SergeC2