I've been using Ctrl-Scroll Lock Scroll Lock feature (CrashOnCtrlScroll) with
Vista to manually blue screen my machine to capture kernel memory dumps for
debugging purposes when my Vista box hangs. For some reason all of a sudden
this no longer works. The blue screen occurs every time but no memory.dmp
file is generated. I have only one drive in the machine (C: drive) and there
is plenty of free space (12GB).

Any ideas why Vista would stop capturing dump files in this manner? Is
there some limit where it will stop capturing them?