Neither you nor our story teller debugged the system in question. You can't even be sure mucking with the page file actually was the fix. It certainly could have been one big coincidence.
OK, how about this instead: If the story is true ...
It might be my autism (I have Asperger's) which prevents me from seeing something which is obvious to the pair of you "normals", but what possible reason would I have for making up a story?
Recounting a personal anecdote is a far cry from telling a story.
If after several reboots, reinstalling drivers there is no improvement in a situation and the clearing of the virtual memory and one reboot does resolve the issue then it must have been one hell of a coincidence. If it were only once or twice that doing this resolved issues then again there might be other reasons. However when I have applied this very simple process and it has been effective hundreds of times then I will stick with it as a first step towards fixing an issue which doesn't have an otherwise obvious cause. The pair of you can obviously do whatever makes you happy.