Hi FriDanny :) I was reading about your wifi problem and I experience the same thing. Error code 86420 is interference with the firewall if you didn't know that... The solution I am providing you is not a 100% guaranteed answer to solving your problem but it somewhat works. First, you will have to turn off the firewall of any computer turned on in your house... And also make sure you don't have other parties, like for example family members using up the connection by doing things like downloading files. If that still doesn't work... move to other areas of your area where you are accessing wifi, I know this sounds absurd but it has worked for me. Like for example, when I connect to people on wifi... either my computer area, my bedroom or the family room guranteeds a secure or slightly stable connection. When those areas fail, I eventually find a spot to connect. I hope these tips have somewhat helped with your wifi dilema :)