Guild Wars 2

unchecking the xp compatibility mode has done the trick for my win 7 64 bit system. i now have full screen again.

I have win 7 64 and i have the same problem

the last of several replies said their engineers are looking into it and to ask the postmaster@arenanet.com to contact them for help at this address:
https://io.help.yahoo.com/contact/index?locale=en_US&y=PROD_MAIL&page=contact

This is more a problem with Yahoo system then arenanet. Meanwhile support has removed authentication of my account so i can log in game until this is resolved.

My troubles started when i found the email in spam and i clicked the “not spam” button. Since then no email anywhere from gw2

this is a know problem at yahoo. i still cannot receive email from gw2 since last week and that is after having been in touch with them at least 4 times, i am thinking of switching from yahoo mail
https://forum-en.gw2archive.eu/forum/support/account/Authenticator-issue-1

I received a reply from Yahoo, they stated it is a known issue for them.

i have run in the same problem on the same day. After contacting anet support several, i have found my problem to be with the Yahoo email system. I received an authentication in my spam, so i clicked on the “not spam”, somehow their system is now completely filtering email from the same source. I have contacted Yahoo but have not received any replies yet.
Also great support from Anet, they replied within 2-3 hrs every time i send them a request. Hopefully Yahoo support will be as prompt.