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I need to repair corrupted system files using the system file checker. However I have an installation CD that is not recognized by the sfc utility when I insert it after being prompted. How do I extract the DLLs so that sfc will find them together with any other system files I would require?

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The CD must be of the same service pack level the OS you are running SFC on, copying the wrong DLL's to a system can cause serious errors on reboot, use the correct CD. –  Moab Mar 6 '11 at 15:23
    
What CD should I use? I installed SP3 from the Internet originally. I downloaded the SP3 upgrade iso to try and use that when prompted but it doesn't work. –  user64996 Mar 6 '11 at 23:23

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Propably a Live-CD can help you, have a look at : http://en.wikipedia.org/wiki/List_of_live_CDs#Microsoft_Windows-based

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