When I run my "verify disk" , I get the message: Checking HFS Plus volume. Checking Extents Overflow file. Checking Catalog file. Incorrect size for file Flash CS3 MRU (It should be 0 instead of 286) 2 %) Checking multi-linked files. Checking Catalog hierarchy. Checking Extended Attributes file. Checking volume bitmap. Checking volume bitmap. ir",0) Checking volume information. Invalid volume free block count (It should be 4029724 instead of 4027063) The volume Macintosh HD needs to be repaired. Error: The underlying task reported failure on exit 1 HFS volume checked Volume needs repair ---- So, I know that I need to use my Mac OSX install disk to run the "repair disk" command. My Question is, do I need to use the same 10.4 disk that came with my computer, or can I use another 10.4 disk. I'm wondering, because my friend's disk is 10.4.6, and my system (when new) might have been newer than that. I know that everyone updates the OS when new versions come out, but I'm not sure if I need my exact install disk. ? p.s. does anyone know why this error occurred? I'm about to install Leopard, so I want things to be in good condition.