Data Exception Prevention (DEP) Error with Internet Explorer

Discussion in 'Windows Vista General Discussion' started by Robbie, Jun 5, 2007.

  1. Robbie

    Robbie Guest

    This is another one of those obtuse problems related to Microsoft's
    security features.

    We have tested audio streaming from three radio stations. Audio from two
    radio stations works properly. With the third station, (WLRN, Miami)
    Internet Explorer exits with a Data Protection Error as soon as the home
    page starts displaying. DEP was disabled for iexplore.exe, but this
    didn't make any difference.
    This same station's Web page and audio streaming work properly with
    Internet Explorer running on Windows Server 2003 and with Netscape
    running on Windows Server 2008. There is nothing obvious in the debug
    dump except that iexplore.exe attempted an illegal memory access.

    I don't know why this error occurs, but did find multiple Microsoft
    knowledge base (kb) notes that discuss the problem. It is apparently
    related to a combination of a specific Web page, Internet Explorer and
    some unknown module being loaded together into memory. There is no
    suggestion about finding the errant module other than by trying the
    removal of any new modules one by one.

    DEP can be disabled by running: BCDEDIT.exe /set {current} nx AlwaysOff.
    Interestingly, VistaBootPro 3.2 can set two of the three DEP parameters,
    but not "AlwaysOff".
    Internet Explorer works fine with station WLRN after DEP is turned off.
    Robbie, Jun 5, 2007
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  2. Thomas Lipowicz, Jun 6, 2007
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  3. Hi Thomas,

    Thank you for the link.
    We are not using a 32 bit version of Internet Explorer on a 64 bit
    version of Vista or Windows Server 2008. Also, DEP was specifically
    disabled for Internet Explorer (iexplore.exe) and this did not correct
    the error. This does not mean, however, that the culprit isn't a Java
    One interesting circumstance is that the debugger reports that there has
    been an illegal memory access. Usually this situation results in a
    program error regardless of whether or not DEP is enabled.

    Robert Robinson, Jun 6, 2007
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