On my 2.0 Ghz C2D iMac the OS is just amazingly slow and unresponsive. Startup time is slow and the time it takes from entering password to both the dock and menu bar appearing takes ages (at least 5x the time compared to Tiger on my 400mhz G3!!!) when I drag something to the trash there is a couple of second delay, opening up programs seems slower than it should. Why is this happening? I've tried pretty much everything, Onyx, I've archived and installed, and nothing has helped.