Pagefile is already automatically handled by Windows. Uninstalled and reinstalled PChat so going to see if issues are caused by changing any settings.
EDIT: Nope.
EDIT 2: Attempted all fixes that have worked with other programs including Admin mode, Compatibility modes, setting affinity to 1 cpu core. Nothing.
EDIT 3: Tried with Icon, after a few minutes the same error occurred so the issue is apparently with CoH itself.