If you saw my old thread, I had trouble starting my iMac g3 up. Well I did get it starting, while it starts up, I get the error "A system error has occurred. Virtual memory I/O Error." Then something about holding down shift to start without extensions. So I did that, and it worked so what should I do now

. Help would be appreciated!
Also, I have tried 'Apple-Option-P-R' , I have done 'Apple-Option-O-F' and did some commands I don't remember them. Anyways help will be appreciated.
TheKeeperofHam