I am having the exact same problem. Launch the game, put in my username/pw hit enter and it freezes for a second than crash to desktop. The command prompt window stays open for another minute to two until it says MVAS thread running and then closes. It usually works after 1-2 retrys but I have tried a dozen times so far today no luck. I even tried waiting until it sayd MVAS thread running before I logged in, no luck.
I typically have alot going on in the background, plenty of IE, FF windows, a remote desktop session, trillian, antivirus (nod32), utorrent, rightmark CPU clock utility, CPUGenie, skype, feed reader, PDANet, hotspot shield, active sync, free download manager, depositfiles download manager.
These are programs I always have running even when EnB works.
Windows 7 Pro x64
Catalyst 10.8 (Radeon Mobility 4570)
4GB of RAM, with all my applications ~2.6GB
Maybe we can figure out some common theme as to what we are running that causes it.
As per a previous suggestion to run checkdesk, I decided to give that a shot, and there is nothing wrong with my disk.
Intersting I closed deposit files download manager and I got in, random chance possibly? I will keep you posted... Weird, after i logged in selected my character I CTDed, second time around I got in..