First the scenario, Then the ailments. Lastly the awesome users with possible answers/fixes. I was running a MBP 2.0 Core Duo with 80gb HD and Tiger. The space was so limiting, I felt like I was gasping for air everytime I did anything on the computer. Purchased Hitachi Travelstar 200gb (head of its class, tons of positive reviews from Newegg) http://www.newegg.com/Product/Product.asp?Item=N82E16822145160 After purchase, used HD enclosure kit, Super Duper software, cloned 80gb internal to 200gb external. So far so good. Performed surgery on MBP (she was such a trooper, super easy process, barely bled). Next install leopard. Leopard says I can't because 200gb when formatted was not GUID partion table formatted. Crap... Delete some precious music, movies, etc from 80gb and install Leopard over Tiger on the 80gb (still sobbing over missed files). 80gb is now in external drive. Boot into 80gb and tried using Super Duper to copy 80gb to 200gb internal. No luck. Download Carbon Copy Cloner. Success after 2 tries! And now for the problem: My computer locks up all the time. I apply similar usage to computer (8 apps open: mail, safari, quictime, itunes, etc.) And my computer will lock up on the 8th app or so. Has happened 3 out of 3 times. When I cold boot (I have to press and hold power due to lock up) It takes 5-7 minutes to come back online. Stays on Blue screen for 4-5 minutes. This seems a bit illogical. Can someone help me figure out the extremely slow load times and lockups? I had a 5400rpm 80gb, the new one is 7200rpm with far superior specs. Thanks in advance to all the helpers and anti-demoralizing posters. This is my first surgery.