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| Guest | Permissions issues with WinFX installation I've been trying to install the December CTP of WinFX and I've been having problems getting it all to work. I've tracked down at least some of the problems and wanted to report them here. One symptom of the problem was that if I browsed to a website that hosted a XBAP application (e.g. http://www.valil.com/winfx/Valil.Chess.WinFX.xbap) it didn't recognize it as a WPF application and asked to download it instead. The problem is that when the WinFX runtime components are installed, they've have the access rights in the registry set incorrectly. I normally run WinXP as a non-administrator user. I rarely use the Administrator account and elevate my account permissions temporarily when necessary to administrator rights using MakeMeAdmin (see http://blogs.msdn.com/aaron_margosis...24/193721.aspx if you want details). This works quite well for almost everything. When WinFX installs, it (correctly) creates a MIME type in this registry key: HKEY_CLASSES_ROOT\MIME\Database\Content Type\application/x-ms-xbap and gives Read/Write permissions to the administrators and Read permissions to users. The problem is that when the installation registers these file extensions and handlers: HKEY_CLASSES_ROOT\.xbap HKEY_CLASSES_ROOT\Windows.Xbap HKEY_CLASSES_ROOT\Windows.Xbap.1 it gives Read/Write permissions to the administrators and NO permissions to users. So when you try to run the WPF application using Internet Explorer as a non-administrator it can't read any of the registry keys and considers the ..xbap file an unknown file type. Running as an administrator or manually adding Read permissions for users to the above keys solves the problem. I suspect there are many other issues besides this specific one when running as a non-administrator though because of permission settings not being correct on other keys (I'm new to WPF so I'm not sure where else to check yet). Note that I've tried installing with the Local Security Policy for "System objects: Default owner for objects created by members of the Administrators group." set to both "Object Creator" and "Administrators group" and the effects seem to be the same. |
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