Hey guys, Im new to this, usually i find my answer from a question someone else has already asked, but I have a 2009 20" iMac (2.66ghz). It originally had 2gb of ram and a 320gb hard drive. I upgraded to 8gb ram and it ran like a dream. Yesterday I replaced my hard drive with a 2tb internal hard drive, and since then it's started running really slow... Apps taking a long time to load, safari too, and general stuff like saving a file takes a lot of time to process. I have repaired the disk using disk utility but it said it was all ok, i am currently defraging which I am hoping might help? I don't know much about this stuff, but is my computer too old to run such a big hard drive?? What else could it be? I appreciate any help.