IBook won't shut down or restart

Hello all!
I havent been able to shut down or restart my iBook! A friend of mine used my computer and I didnt know she stuck in one of those USB plug-ins (sorry, I dont know what its called) and pulled it out without ejecting properly and since then I see this disc logo marked "CDR" on my desktop that won't eject no matter how many times I drag it to trash and now just realized I can't shut down or restart my iBook. Help!!!
Many thanks!

Hi golfpunkgirl
Welcome to discussions
Which iBook is it - the White iBook has a Reset Button slightly to the right above the audio / videoport
Close all open apps then carefully using a paper clip gently press the button.
If you have the booklet that came with the machine you can see it on the diagram
This will force a reset on the machine - check out time /date afterwards
chris

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4 GB Ram/320 GB HD
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IBook won't shut down or restart

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