DAX and the HP audio drivers conflict to produce a memory leak that runs out of memory in a day (depending on physical memory and page size). It shows as STACSV64.EXE taking all virtual memory and applications terminating from lack of memory.
The driver is described as (HP) IDT PC Audio Drivers. Laptop is HP ProBook 6470b. Runs well on my desktop.
The problem does not exist if either DAX or PC Audio is removed from the system.