Plz help emergency!! Driver problem?

I restarted my computer...last wat i was doing was working on iTunes ..and thn after the restart all my drivers went off...I mean nothing is working..in device manager all the icons of the devices has a yellow exclamatory and when I click on it it says code 39 and also the driver may be missing or corrupted ....Plz... show more I restarted my computer...last wat i was doing was working on iTunes ..and thn after the restart all my drivers went off...I mean nothing is working..in device manager all the icons of the devices has a yellow exclamatory and when I click on it it says code 39 and also the driver may be missing or corrupted ....Plz help!!
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