I have a Powerbook G4 with OS 10.3.9

Last night Safari crashed and here is what happens.

If open Safari or Firefox they will open for about 30 secs and then just fail. it then prompts me to send a report to Apple.

After the 2nd time I try to open the programs it locks up the computer.

I ran Discwarrior to day and it did not help.
I also deleted the caches in safari and firefox.

I am not super computer educated so what else to I do?
This is my frist problem in 4 years.

Thanks for any help.