Second pic which shows Error 0xc0000005, which is right after I click on Close the program.
I tried googling the problem and found no solutions except one - if I disable my anti-virus program, I was able to start the game without problems.
A bigger problem emerged after that - I was repeatedly getting kicked out of the game, like if someone was trying to log in. I had really big problems with the log-in feature on the website as well, and thought that my account was stolen. Fortunately, after a few bumps along the road, I was able to reset my password and finally log in.
But now I don't want to disable AVG anymore and the strange thing is - the game worked fine yesterday, no errors. I shut down my PC yesterday, which I rarely do, before going to bed. Maybe this was the cause because today I can't open the game?
So if this is an issue with my client/PC, I also tried logging in from the Warmane client, didn't work as well. I tried deleting both of my clients and downloading the one with the old models - again no luck.
It started because AVG updated something. Avast started doing that to all versions of WoW a few months ago, including latest retail client at that time.