I have a 4 year old 24" iMac. It's still quite fast at iMovie, iPhoto, and just about everything else... but lately there's been a BIG problem. It started with Safari. I'd notice that Safari would really slow things down. According to iStat the RAM and the Processors weren't being overly strained, but the machine would really slow down. Then, it stopped slowing down and started to STOP everything. The iMac would grind to a complete Hault whenever Safari was started up. So, I switched to Chrome and that worked fine for a while, but starting last night, now Chrome has ground to a hault. I have to manually shut off the machine whenever this happens because the machine becomes completely unresponsive. In the event that I am able to force-quit the application, everything returns to normal. As a side note, last night spotlight was indexing my drive for some reason? Not sure if this is related, but thought I'd mention it. Also, I did try and uninstall Adobe Flash a few nights ago but the problem remains. Maybe I didn't get it uninstalled completely? Thought it was flash related, but now I'm not sure? Any help would be much appreciated!!!