My dock disappeared, my clock disappeared

[uuuuuuuu8]

i also can't click on anything on the desktop, the only thing that is there and works are the words on the top, stopping at help. Also after every word i write, a pop up says 'alert cannot contact spell checker,' When i open safari i also cannot get it back to finder, and i can't search anything on the computer because after the second letter the screen flashes.

It started this morning i tried to write something in stickies and the computer went crazy to a blue screen and the loading circle started spinning around so i shut it down, when i loaded it up i had all these problems.
I have iBook g4 from 2005. What should i do, i don't know anything about computers. I tried searching online i tried to use killall Dock in terminal it didn't work, it said no matching processes were found.

 

[BlueRevolution]

Save any open documents, then run

sudo reboot

Hopefully things will be back to normal when the machine starts up again. If not, try repairing permissions.

 

[uuuuuuuu8]

i tried what you recommended but they didn't work. thanks though.

 

[i.shaun]

Make a new user account to see if it works, as yours seems to be corrupted in some way

Accounts are in System preferences if you can get to it