My x64 Windows 7 Work PC all of sudden started using huge amounts of virtual memory (or I hadn't noticed the increased use until yesterday when windows complained about running out of memory). Process explorer didn't show any service or program that was the cause of 20+GB of virtual memory being consumed. So I started looking for services to disable when I ran into this article. I killed "Offline files" and boom! My virtual memory consumption went from 25GB to 3! Not sure what caused the increased usage but now I can sleep better knowing that the problem is gone now that i've disabled the service (and that it wasn't some kind of malware causing this.) It's pretty sad that MS services can use up resources that don't show up in any of the standard tools (the system cache almost behaves like that too).