If your computer is using that much of your pagefile it probably means you have far too many processes running in the background, which could simply be taxing your processor or causing disk thrashing. If Windows is setting your pagefile to 10GB, something is terribly wrong. Manually set it to match the amount of RAM you have in your computer. If your video card is sharing 2GB of memory with your computer, set the pagefile to 6GB. It doesn't look like you do, but, if you have a secondary drive (not an external drive or a secondary partition, but an actual second hard drive) I'd recommend forcing the pagefile to that drive as well. And you should still post a report from HijackThis so we can see what/how many processes are running.