Fejl 1406 ved installation af Visual Studio .NET på WinXP

Hej eksperter,

Jeg har hentet en studieversion af Microsoft Visual Studio .NET 2003 Professional, men hver gang jeg forsøger at installere får jeg nedenstående fejl (taget fra fejl-loggen) lige til sidst i installationsprocessen:

[09/27/05,23:24:32] Visual Studio .NET Professional 2003 - English: [2] ERROR: Error 1406.Could not write value  to key \Software\Classes\.wsdl\OpenWithList\devenv.exe.  Verify that you have sufficient access to that key, or contact your support personnel.
[09/27/05,23:24:43] Visual Studio .NET Professional 2003 - English: [2] ERROR: Error 1406.Could not write value  to key \Software\Classes\.wsdl\OpenWithProgids\VisualStudio.wsdl.7.1.  Verify that you have sufficient access to that key, or contact your support personnel.
[09/27/05,23:24:49] Visual Studio .NET Professional 2003 - English: [2] ERROR: Error 1406.Could not write value  to key \Software\Classes\.wsdl\OpenWithProgids\wsdlfile.  Verify that you have sufficient access to that key, or contact your support personnel.
[09/27/05,23:24:55] Visual Studio .NET Professional 2003 - English: [2] ERROR: Error 1406.Could not write value  to key \Software\Classes\.xsd\OpenWithList\devenv.exe.  Verify that you have sufficient access to that key, or contact your support personnel.
[09/27/05,23:25:30] Visual Studio .NET Professional 2003 - English: [2] ERROR: Error 1406.Could not write value  to key \Software\Classes\.xsd\OpenWithProgids\VisualStudio.xsd.7.1.  Verify that you have sufficient access to that key, or contact your support personnel.
[09/27/05,23:25:56] Visual Studio .NET Professional 2003 - English: [2] ERROR: Error 1406.Could not write value  to key \Software\Classes\.xsd\OpenWithProgids\xsdfile.  Verify that you have sufficient access to that key, or contact your support personnel.
[09/27/05,23:26:25] Visual Studio .NET Professional 2003 - English: [2] ERROR: Error 1402.Could not open key: HKEY_LOCAL_MACHINE\Software\Classes\xsdfile\DefaultIcon.  Verify that you have sufficient access to that key, or contact your support personnel.
[09/27/05,23:26:26] Visual Studio .NET Professional 2003 - English: [2] ACTION FAILURE: Action ended 23:26:26: InstallFinalize. Return value 3. See MSI log for details.
[09/27/05,23:31:19] Visual Studio .NET Professional 2003 - English: [2] ERROR processed; exception was thrown for retail build
    Developer Comment:  Action Start message out of order
    Build Time:  Thu Feb 15 17:56:18 2001
    HRESULT:  -2147467259
[09/27/05,23:31:32] Visual Studio .NET Professional 2003 - English: [2] ACTION FAILURE: Action ended 23:31:32: INSTALL. Return value 3. See MSI log for details.
[09/27/05,23:31:35] setup.exe: [2] ISetupComponent::Pre/Post/Install() failed in ISetupManager::InstallManagerHelper()
[09/27/05,23:31:35] setup.exe: [2] Component error string not specified in ISetupManager::AddToActionResultCollection()

Jeg har søgt nettet igennem efter fejlene, men alle løsninger er til Win9x eller WinNT - ikke WinXP Professional. Jeg har også forsøgt at lukke Norton ned under installationsprocessen, men det hjalp heller ikke. Hvis jeg åbner regedit og navigere ned til de angivne mapper i fejl-loggen, så findes ingen af registreringsnøglerne.

Er der nogen som har et bud på hvad der går galt? På forhånd tak!