When I first booted this G4 running OS X 10.4, it booted fine.  I worked on some little issues like removing things from starting at boot, chasing a Norton Liveupdate problem, etc. for probably 1/2...

For the last few months I when I shutdown my Mac it will restart instead of shutting down. When I repair permissions it will generally fix it for awhile, but it will reoccur again later on. A...