I have an early 2009 iMac 24" with a 3.06 processor and 4gb of ram. I can't remember how it was when I first got it, but for a while now it seems to be very slow compared to what I would expect. After a restart the first time I open up many applications they bounce a number of times (10-20) before the app will open. It is particularly bad on Chrome, iTunes and iPhoto. Even if it hasn't been restarted recently I find that apps take a long time open and other tasks just aren't that snappy compared to what I would expect from a still high end machine. I also have a late 2010 MBA with a 1.86 processor and also 4gb of ram and it is far quicker at pretty much all tasks. I know the MBA has a Flash hard drive which will contribute but I wouldn't think the iMac should be so much slower than the MBA. Going on memory I feel like my upgrade to Snow Leopard which was supposed to make the iMac faster on regular tasks didn't have much of an impact. I didn't do a clean install then and I'm wondering if I should go through the arduous task of finally doing a clean install. Before I do that is there anything else people would recommend to try before the clean install? Thanks for the help.