This happened a lot more when I had "fast user switching" enabled, but now it's happening again. If I leave my machine turned on and running for a few days like I normally do, after a while, the page file will get up to like 700 megs (right now after a reboot it's around 300 megs, it used to be smaller though...), and the system will just absolutely crawl, and the hard drive is churning like no other. Is there a fix for this, besides "just reboot"? It's ridiculously annoying, and sometimes I'm working on a project for a few days at a time, and don't want to shut it down and restart it, re-open all my programs, etc...