When I log out of one character and log into another my game will often lock up. Some days it happens a lot, some days not at all. Overall, maybe 1/3 of the time. This only happens in the 64bit client. This has been happening since the 64 bit client was introduced and as of today is still happening. It occurs while the zone loading screen is up. I generally have to hit ALT-CTRL-DEL to call up the task manager and kill the process as it won't respond to any other keys (including the windows key. Note that this never happens when logging into a character for the first time in a session, only which switching to another character.
System Info:
I am using a laptop with i7 clocked to 3.5ghz, 16GB ram, NVIDIA GeForce GTX 870M. My drive is SSD (Crucial CT512MX100SSD1). I have a fast wired internet connection (TWC) and I'm located near Austin, TX.
ContraTempo
Carpe DM
Seize the Dungeon Master