i have a powerbook g4. it is running slow. it really lags for loading websites and such. i ran disk utility. i got a few red messages. one says "volume bitmap needs minor repair" another says "the volume macintosh hd needs repair" also, "error: the underlying task reported failure on exit". i know there is a way i might be able to fix this with the startup disk. but not sure how. can someone please give me some advice?? sorry for the long read.