Referencing a propID that doesn't exist
OOM: Heap, bytes=1276432,
This is the line that actually matters; your client’s crashing because it’s running Out Of Memory.
You seem to be running 32-bit Windows 7, so depending on certain system settings the game may be unable to address more than 2 GB of memory. This is clearly not enough. Getting 64-bit Windows would probably help, but since you’ve already familiarized yourself with the art of reinstalling Windows, you could try messing with the Windows userspace/kernel memory address split. See:
Basically doing that lets applications built with a certain flag set access 3 GB of memory in 32-bit Windows. As far as I know, GW2’s one of them.
Thanks I’ll give this a shot