So around Christmas, I bought a Seagate Momentus 500G harddrive for my new Unibody MacBook Pro. (Newegg Link) Last week I used Carbon Copy Cloner to clone my harddrive to the Seagate, then made the swap. I used Winclone to copy my Boot Camp partition. Ever since the swap, my computer has been sluggish as all hell. Sometimes, while clicking the harddrive, it can take 2 or 3 secs just to open the window. Menus system wide are sluggish and don't open immediately when you click on them. I used Activity Monitor to see if things were awry in any way and while memory usage looked to be a bit higher then I remembered, I had no data about what the memory was like before the swap. So my question is this: Had anyone else encountered this? Does replacing the harddrive affect the system resources? Does that even make sense? Should I format and start from scratch? Thanks community!