I've had my iMac for about a year now (20inch Intel) and I have noticed significant slowdown on the machine. I was wondering if there are programs to run to get rid of unnecessary programs or even malicious programs running in the background at startup. Also, can anyone point me in the direction of a decent complete uninstaller program. And to top it all off my Mighty Mouse won't scroll down and cleaning it isn't helping....sigh. Thanks for the help.