Nostalrius Begins - Quality wow vanilla realm (1.12)

Hey, I've just installed a brand new (original) Windows 7 on my computer as I figured it would help increase its performance. However, since I've installed WoW Classic from your site again I've come to face a couple of problems. Just after installing, I had to type in my account information numerous times till the "Disconnected from Server" notification stopped popping up and I got to my character list (yes the realm I'm logging on to is Nostalrius PvP). Now, on the other hand, I don't get past the stage "Connected" and it just disconnects me right after I get to that stage. I've tried getting to a solution using these threads: https://forum.nostalrius.org/viewtopic.php?f=45&t=5359 , https://forum.nostalrius.org/viewtopic.php?f=45&t=11569. Unfortunately, I didn't manage to fix it.

Now, I've thought that it probably must be some virus or firewall options blocking it, but I have no idea how to fix that, it could also be something else..
Does any solution come to you guys' mind?

Any tips and solutions very much appreciated, peace

Seems like there's a problem with the server atm.

Hopefully it is, if not, I'm screwed :/

i cannot log in also, this has been happening the past couple days off and on. thanks blozzard