What ate all my memory?!?

Merlin2000 said:

That's awesome.. I'm glad my ram isn't just sitting around waiting to be used. I never saw this on XP, definitely an improvement!

XP had cacheing but it only cached programs you had already opened. So when you restarted your machine it would clear that cache.

I personally don't like superfetch and disable it as I find it to cause too much disk thrashing and slow things down.

Cacheing in windows doesn't load up apps - superfetch does that in startup. It holds apps you use and close in the current session so they can start faster. If something else needs RAM the cache is given over to that app.