Server 2003 STD R2 to ENT R2 setup error

10 pts.
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Windows Server 2003 Enterprise Edition
Windows Server 2003 Standard R2
Trying to upgrade Windows Server 2003 Standard R2 to Windows Server 2003 enterprise R2 and get an error when I select upgrade. "Setup cannot continue because some necessary information cannot be accessed in the registry." "An I/O operation initiated by the registry failed unrecoverably. The registry could not read in, or write out, or flush, one of the files that contain the system's image of the registry" I login as the domain Admin ( this is a secondary domain controller ) and even tried copying all of the file to disk and install from their.

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Symantec Antivirus Corporate causes this error on Windows Server 2003 Standard SP2. Tried all solutions, I googled, but same error again after rebooting. Uninstalling with NoNav and rebooting solved it.

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  • Subhendu Sen
    U didn't mention here if WS 2003 sandard & ent 2003 r retail / oem vers.... is the WS 2003 ent includes r2 and sp2 !. I am not sure about that. Plz make sure about the above lines.... also 32/64 bit an issue(guessing 32 bit).
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