I'm running Win2K, 1.3 GHz, 768MB RAM, and now that I've "up"-graded to 2.7.3, LimeWire hogs all my CPU for at least 10 seconds. Eventually everything unfreezes, but it always happens again and again and again and again... This is regardless of whether I'm downloading. I don't have to reboot or anything that dramatic but it's really freaking annoying!!