This morning my iMac started to act a bit sluggish and I was getting a lot of beach balls (especially with Safari). I installed Windows 7 this afternoon via Boot Camp (something I had planned on doing for a while now) and when I came back to Mac OS I found that it is extremely slow now. When I expand a folder in my dock the icons load 2 at a time, taking maybe 3 seconds to populate the applications folder. Loading programs takes much longer as well. I am checking disk permissions via OnyX right now and it has been running for about 20 minutes. In the past this task took about 3-5 minutes. It's still running as I type this. Im looking for some ideas as to what I should check or do to figure out what is causing the issue. Thanks in advance.