Hi, I jumped ship from PC and I bought a MacBook at the beginning of this year. I have had no problems with it so far but I am wondering whether I should be doing some regular housekeeping within Tiger to maintain the system's performance. With a PC I defragged the system, deleted temp files and ran programs that helped to keep everything together. Should I also be doing this in Tiger?? Should I be repairing "Permissions"?? Is there a defragg prog? Or am I OK plodding on as I am? Also I have File Vault running, is this essential? As I don't Shut Down my MacBook that often (usually put it to sleep) is it actually making a difference? Does it back up my files?? Any advice would be of great help. The more the merrier. Cheers TheBadger.