I hope this isn't redundant as I came across quite a few posts about the c0000005 code, but I attempted all the corrections I could find to no avail.
I'm curious if it is possibly different as well because I can log in just fine with other characters, but in particular my paladin cannot. If I leave the screen alone it just fails to join the game, but if i click on it at all it gives me the unhandled exception c0000005. This occurred just after server reset last night. I logged out with just a few minutes until reset. After logging out I noticed the launcher had an update so I ran it for the most current version. Logged back in and had the issue with the paladin, but the new druid/paladin/assassin characters I made can join a game just fine. Please let me know if more information is needed.
Thanks!